Me. Justice Fortas
delivered the opinion of the Court.
I.
This appeal challenges the constitutionality of the “anti-evolution” statute which the State of Arkansas adopted in 1928 to prohibit the teaching in its public schools and universities of the theory that man evolved from other species of life. The statute was a product of the upsurge of “fundamentalist” religious fervor of the twenties. The Arkansas statute was an adaptation of the famous Tennessee “monkey law” which that State adopted in 1925.1 The constitutionality of the Tennessee law was upheld by the Tennessee Supreme Court in the celebrated Scopes case in 1927.2
The Arkansas law makes it unlawful for a teacher in any state-supported school or university “to teach the [99]*99theory or doctrine that mankind ascended or descended from a lower order of animals,” or “to adopt or use in any such institution a textbook that teaches” this theory. Violation is a misdemeanor and subjects the violator to dismissal from his position.3
The present case concerns the teaching of biology in a high school in Little Rock. According to the testimony, until the events here in litigation, the official textbook furnished for the high school biology course did not have a section on the Darwinian Theory. Then, for the academic year 1965-1966, the school administration, on recommendation of the teachers of biology in the school system, adopted and prescribed a textbook which contained a chapter setting forth “the theory about the origin ... of man from a lower form of animal.”
[100]*100Susan Epperson, a young woman who graduated from Arkansas’ school system and then obtained her master’s degree in zoology at the University of Illinois, was employed by the Little Rock school system in the fall of 1964 to teach 10th grade biology at Central High School. At the start of the next academic year, 1965, she was confronted by the new textbook (which one surmises from the record was not unwelcome to her). She faced at least a literal dilemma because she was supposed to use the new textbook for classroom instruction and presumably to teach the statutorily condemned chapter; but to do so would be a criminal offense and subject her to dismissal.
She instituted the present action in the Chancery Court of the State, seeking a declaration that the Arkansas statute is void and enjoining the State and the defendant officials of the Little Rock school system from dismissing her for violation of the statute’s provisions. H. H. Blanchard, a parent of children attending the public schools, intervened in support of the action.
The Chancery Court, in an opinion by Chancellor Murray O. Reed, held that the statute violated the Fourteenth Amendment to the United States Constitution.4 The court noted that this Amendment encompasses the prohibitions upon state interference with freedom of speech and thought which are contained in the First Amendment. Accordingly, it held that the challenged statute is unconstitutional because, in violation of the First Amendment, it “tends to hinder the quest for knowledge, restrict the freedom to learn, and restrain the freedom to teach.” 5 In this perspective, the Act, [101]*101it held, was an unconstitutional and void restraint upon the freedom of speech guaranteed by the Constitution.
On appeal, the Supreme Court of Arkansas reversed.6 Its two-sentence opinion is set forth in the margin.7 It sustained the statute as an exercise of the State’s power to specify the curriculum in public schools. It did not address itself to the competing constitutional considerations.
Appeal was duly prosecuted to this Court under 28 U. S. C. § 1257 (2). Only Arkansas and Mississippi have such “anti-evolution” or “monkey” laws on their books.8 There is no record of any prosecutions in Arkan[102]*102sas under its statute. It is possible that the statute is presently more of a curiosity than a vital fact of life in these States.9 Nevertheless, the present case was brought, the appeal as of right is properly here, and it is our duty to decide the issues presented.
II.
At the outset, it is urged upon us that the challenged statute is vague and uncertain and therefore within the condemnation of the Due Process Clause of the Fourteenth Amendment. The contention that the Act is vague and uncertain is supported by language in the brief opinion of Arkansas’ Supreme Court. That court, perhaps reflecting the discomfort which the statute’s quixotic prohibition necessarily engenders in the modern mind,10 stated that it “expresses no opinion” as to whether the Act prohibits “explanation” of the theory of evolution or merely forbids “teaching that the theory is true.” Regardless of this uncertainty, the court held that the statute is constitutional.
On the other hand, counsel for the State, in oral argument in this Court, candidly stated that, despite the State Supreme Court’s equivocation, Arkansas would interpret the statute “to mean that to make a student aware of the theory . . . just to teach that there was [103]*103such a theory” would be grounds for dismissal and for prosecution under the statute; and he said “that the Supreme Court of Arkansas’ opinion should be interpreted in that manner.” He said: “If Mrs. Epperson would tell her students that ‘Here is Darwin’s theory, that man ascended or descended from a lower form of being,’ then I think she would be under this statute liable for prosecution.”
In any event, we do not rest our decision upon the asserted vagueness of the statute. On either interpretation of its language, Arkansas’ statute cannot stand. It is of no moment whether the law is deemed to prohibit mention of Darwin’s theory, or to forbid any or all of the infinite varieties of communication embraced within the term “teaching.” Under either interpretation, the law must be stricken because of its conflict with the constitutional prohibition of state laws respecting an establishment of religion or prohibiting the free exercise thereof. The overriding fact is that Arkansas’ law selects from the body of knowledge a particular segment which it proscribes for the sole reason that it is deemed to conflict with a particular religious doctrine; that is, with a particular interpretation of the Book of Genesis by a particular religious group.11
III.
The antecedents of today’s decision are many and unmistakable. They are rooted in the foundation soil of our Nation. They are fundamental to freedom.
Government in our democracy, state and national, must be neutral in matters of religious theory, doctrine, [104]*104and practice. It may not be hostile to any religion or to the advocacy of no-religion; and it may not aid, foster, or promote one religion or religious theory against another or even against the militant opposite. The First Amendment mandates governmental neutrality between religion and religion, and between religion and nonreligion.12
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Me. Justice Fortas
delivered the opinion of the Court.
I.
This appeal challenges the constitutionality of the “anti-evolution” statute which the State of Arkansas adopted in 1928 to prohibit the teaching in its public schools and universities of the theory that man evolved from other species of life. The statute was a product of the upsurge of “fundamentalist” religious fervor of the twenties. The Arkansas statute was an adaptation of the famous Tennessee “monkey law” which that State adopted in 1925.1 The constitutionality of the Tennessee law was upheld by the Tennessee Supreme Court in the celebrated Scopes case in 1927.2
The Arkansas law makes it unlawful for a teacher in any state-supported school or university “to teach the [99]*99theory or doctrine that mankind ascended or descended from a lower order of animals,” or “to adopt or use in any such institution a textbook that teaches” this theory. Violation is a misdemeanor and subjects the violator to dismissal from his position.3
The present case concerns the teaching of biology in a high school in Little Rock. According to the testimony, until the events here in litigation, the official textbook furnished for the high school biology course did not have a section on the Darwinian Theory. Then, for the academic year 1965-1966, the school administration, on recommendation of the teachers of biology in the school system, adopted and prescribed a textbook which contained a chapter setting forth “the theory about the origin ... of man from a lower form of animal.”
[100]*100Susan Epperson, a young woman who graduated from Arkansas’ school system and then obtained her master’s degree in zoology at the University of Illinois, was employed by the Little Rock school system in the fall of 1964 to teach 10th grade biology at Central High School. At the start of the next academic year, 1965, she was confronted by the new textbook (which one surmises from the record was not unwelcome to her). She faced at least a literal dilemma because she was supposed to use the new textbook for classroom instruction and presumably to teach the statutorily condemned chapter; but to do so would be a criminal offense and subject her to dismissal.
She instituted the present action in the Chancery Court of the State, seeking a declaration that the Arkansas statute is void and enjoining the State and the defendant officials of the Little Rock school system from dismissing her for violation of the statute’s provisions. H. H. Blanchard, a parent of children attending the public schools, intervened in support of the action.
The Chancery Court, in an opinion by Chancellor Murray O. Reed, held that the statute violated the Fourteenth Amendment to the United States Constitution.4 The court noted that this Amendment encompasses the prohibitions upon state interference with freedom of speech and thought which are contained in the First Amendment. Accordingly, it held that the challenged statute is unconstitutional because, in violation of the First Amendment, it “tends to hinder the quest for knowledge, restrict the freedom to learn, and restrain the freedom to teach.” 5 In this perspective, the Act, [101]*101it held, was an unconstitutional and void restraint upon the freedom of speech guaranteed by the Constitution.
On appeal, the Supreme Court of Arkansas reversed.6 Its two-sentence opinion is set forth in the margin.7 It sustained the statute as an exercise of the State’s power to specify the curriculum in public schools. It did not address itself to the competing constitutional considerations.
Appeal was duly prosecuted to this Court under 28 U. S. C. § 1257 (2). Only Arkansas and Mississippi have such “anti-evolution” or “monkey” laws on their books.8 There is no record of any prosecutions in Arkan[102]*102sas under its statute. It is possible that the statute is presently more of a curiosity than a vital fact of life in these States.9 Nevertheless, the present case was brought, the appeal as of right is properly here, and it is our duty to decide the issues presented.
II.
At the outset, it is urged upon us that the challenged statute is vague and uncertain and therefore within the condemnation of the Due Process Clause of the Fourteenth Amendment. The contention that the Act is vague and uncertain is supported by language in the brief opinion of Arkansas’ Supreme Court. That court, perhaps reflecting the discomfort which the statute’s quixotic prohibition necessarily engenders in the modern mind,10 stated that it “expresses no opinion” as to whether the Act prohibits “explanation” of the theory of evolution or merely forbids “teaching that the theory is true.” Regardless of this uncertainty, the court held that the statute is constitutional.
On the other hand, counsel for the State, in oral argument in this Court, candidly stated that, despite the State Supreme Court’s equivocation, Arkansas would interpret the statute “to mean that to make a student aware of the theory . . . just to teach that there was [103]*103such a theory” would be grounds for dismissal and for prosecution under the statute; and he said “that the Supreme Court of Arkansas’ opinion should be interpreted in that manner.” He said: “If Mrs. Epperson would tell her students that ‘Here is Darwin’s theory, that man ascended or descended from a lower form of being,’ then I think she would be under this statute liable for prosecution.”
In any event, we do not rest our decision upon the asserted vagueness of the statute. On either interpretation of its language, Arkansas’ statute cannot stand. It is of no moment whether the law is deemed to prohibit mention of Darwin’s theory, or to forbid any or all of the infinite varieties of communication embraced within the term “teaching.” Under either interpretation, the law must be stricken because of its conflict with the constitutional prohibition of state laws respecting an establishment of religion or prohibiting the free exercise thereof. The overriding fact is that Arkansas’ law selects from the body of knowledge a particular segment which it proscribes for the sole reason that it is deemed to conflict with a particular religious doctrine; that is, with a particular interpretation of the Book of Genesis by a particular religious group.11
III.
The antecedents of today’s decision are many and unmistakable. They are rooted in the foundation soil of our Nation. They are fundamental to freedom.
Government in our democracy, state and national, must be neutral in matters of religious theory, doctrine, [104]*104and practice. It may not be hostile to any religion or to the advocacy of no-religion; and it may not aid, foster, or promote one religion or religious theory against another or even against the militant opposite. The First Amendment mandates governmental neutrality between religion and religion, and between religion and nonreligion.12
As early as 1872, this Court said: “The law knows no heresy, and is committed to the support of no dogma, the establishment of no sect.” Watson v. Jones, 13 Wall. 679, 728. This has been the interpretation of the great First Amendment which this Court has applied in the many and subtle problems which the ferment of our national life has presented for decision within the Amendment’s broad command.
Judicial interposition in the operation of the public school system of the Nation raises problems requiring care and restraint. Our courts, however, have not failed to apply the First Amendment’s mandate in our educational system where essential to safeguard the fundamental values of freedom of speech and inquiry and of belief. By and large, public education in our Nation is committed to the control of state and local authorities. Courts do not and cannot intervene in the resolution of conflicts which arise in the daily operation of school systems and which do not directly and sharply implicate basic constitutional values.13 On the other hand, “[t]he vigilant protection of constitutional freedoms is nowhere more vital than in the community of American schools,” Shelton v. Tucker, 364 U. S. 479, 487 (1960). As this [105]*105Court said in Keyishian v. Board of Regents, the First Amendment “does not tolerate laws that cast a pall of orthodoxy over the classroom.” 385 U. S. 589, 603 (1967).
The earliest cases in this Court on the subject of the impact of constitutional guarantees upon the classroom were decided before the Court expressly applied the specific prohibitions of the First Amendment to the States. But as early as 1923, the Court did not hesitate to condemn under the Due Process Clause “arbitrary” restrictions upon the freedom of teachers to teach and of students to learn. In that year, the Court, in an opinion by Justice McReynolds, held unconstitutional an Act of the State of Nebraska making it a crime to teach any subject in any language other than English to pupils who had not passed the eighth grade.14 The State’s purpose in enacting the law was to promote civic cohesiveness by encouraging the learning of English and to combat the “baneful effect” of permitting foreigners to rear and educate their children in the language of the parents’ native land. The Court recognized these purposes, and it acknowledged the State’s power to prescribe the school curriculum, but it held that these were not adequate to support the restriction upon the liberty of teacher and pupil. The challenged statute, it held, unconstitutionally interfered with the right of the individual, guaranteed by the Due Process Clause, to engage in any of the common occupations of life and to acquire useful knowledge. Meyer v. Nebraska, 262 U. S. 390 (1923). See also Bartels v. Iowa, 262 U. S. 404 (1923).
For purposes of the present case, we need not re-enter the difficult terrain which the Court, in 1923, traversed without apparent misgivings. We need not take advantage of the broad premise which the Court’s decision [106]*106in Meyer furnishes, nor need we explore the implications of that decision in terms of the justiciability of the multitude of controversies that beset our campuses today. Today’s problem is capable of resolution in the narrower terms of the First Amendment’s prohibition of laws respecting an establishment of religion or prohibiting the free exercise thereof.
There is and can be no doubt that the First Amendment does not permit the State to require that teaching and learning must be tailored to the principles or prohibitions of any religious sect or dogma. In Everson v. Board of Education, this Court, in upholding a state law to provide free bus service to school children, including those attending parochial schools, said: “Neither [a State nor the Federal Government] can pass laws which aid one religion, aid all religions, or prefer one religion over another.” 330 U. S. 1, 15 (1947).
At the following Term of Court, in McCollum v. Board of Education, 333 U. S. 203 (1948), the Court held that Illinois could not release pupils from class to attend classes of instruction in the school buildings in the religion of their choice. This, it said, would involve the State in using tax-supported property for religious purposes, thereby breaching the “wall of separation” which, according to Jefferson, the First Amendment was intended to erect between church and state. Id., at 211. See also Engel v. Vitale, 370 U. S. 421 (1962); Abington School District v. Schempp, 374 U. S. 203 (1963). While study of religions and of the Bible from a literary and historic viewpoint, presented objectively as part of a secular program of education, need not collide with the First Amendment’s prohibition, the State may not adopt programs or practices in its public schools or colleges which “aid or oppose” any religion. Id., at 225. This prohibition is absolute. It forbids alike the preference of a religious doctrine or the prohibition [107]*107of theory which is deemed antagonistic to a particular dogma. As Mr. Justice Clark stated in Joseph Burstyn, Inc. v. Wilson, “the state has no legitimate interest in protecting any or all religions from views distasteful to them . . . .” 343 U. S. 495, 505 (1952). The test was stated as follows in Abington School District v. Schempp, supra, at 222: “[W]hat are the purpose and the primary effect of the enactment? If either is the advancement or inhibition of religion then the enactment exceeds the scope of legislative power as circumscribed by the Constitution.”
These precedents inevitably determine the result in the present case. The State’s undoubted right to prescribe the curriculum for its public schools does not carry with it the right to prohibit, on pain of criminal penalty, the teaching of a scientific theory or doctrine where that prohibition is based upon reasons that violate the First Amendment. It is much too late to argue that the State may impose upon the teachers in its schools any conditions that it chooses, however restrictive they may be of constitutional guarantees. Keyishian v. Board of Regents, 385 U. S. 589, 605-606 (1967).
In the present case, there can be no doubt that Arkansas has sought to prevent its teachers from discussing the theory of evolution because it is contrary to the belief of some that the Book of Genesis must be the exclusive source of doctrine as to the origin of man. No suggestion has been made that Arkansas’ law may be justified by considerations of state policy other than the religious views of some of its citizens.15 It is clear [108]*108that fundamentalist sectarian conviction was and is the law’s reason for existence.16 Its antecedent, Tennessee’s “monkey law,” candidly stated its purpose: to make it unlawful “to teach any theory that denies the story of the Divine Creation of man as taught in the Bible, and to teach instead that man has descended from a [109]*109lower order of animals.” 17 Perhaps the sensational publicity attendant upon the Scopes trial induced Arkansas to adopt less explicit language.18 It eliminated Tennessee's reference to “the story of the Divine Creation of man” as taught in the Bible, but there is no doubt that the motivation for the law was the same: to suppress the teaching of a theory which, it was thought, “denied” the divine creation of man.
Arkansas’ law cannot be defended as an act of religious neutrality. Arkansas did not seek to excise from the curricula of its schools and universities all discussion of the origin of man. The law’s effort was confined to an attempt to blot out a particular theory because of its supposed conflict with the Biblical account, literally read. Plainly, the law is contrary to the mandate of the First, and in violation of the Fourteenth, Amendment to the Constitution.
The judgment of the Supreme Court of Arkansas is
Reversed.