Tension between free speech and social stability has been a central concern throughout American history. In the 1960s that concern reached a fever pitch with the anti-Vietnam War movement. When antiwar sentiment "invaded" American schools, official resolve to retain order in the classroom vied with the rights of students to speak freely. A key event in that face-off was the Supreme Court decision in Tinker v. Des Moines. As the most important student rights case ever to reach the Supreme Court, Tinker raises important issues regarding First Amendment freedoms and provides a fascinating legal window on a turbulent era.