Academic freedom is a moral and legal concept expressing the conviction that the freedom of inquiry by faculty members is essential to the mission of the academy as well as the principles of academia, and that scholars should have freedom to teach or communicate ideas or facts (including those that are inconvenient to external political groups or to authorities) without fear of repression, job loss, or imprisonment. While the core of academic freedom covers scholars acting in an academic capacity - as teachers or researchers expressing strictly scholarly viewpoints -, an expansive interpretation extends these occupational safeguards to scholars' speech on matters outside their professional expertise.

The Academic Freedom Alliance (AFA) is a non-profit organization formed by college educators to defend free expression. The mission of the organization is to challenge university administrations and provide legal help to professors who face disciplinary action over controversial speech or activities.

A number of anti-evolution bills have been introduced in the United States Congress and State legislatures since 2001. Purporting to support academic freedom, supporters have contended that teachers, students, and college professors face intimidation and retaliation when discussing scientific criticisms of evolution, and therefore require protection.