I think that one of the Warren Court's strongest defense of the First Amendment and the establishment clause within it would be the decision in the case of Engel v. Vitale. The court's demand of outlawing school prayer on the grounds of how it might vitiate other rights of individuals is something still discussed today. However, it is fully understood and accepted that the public sphere cannot be used to infringe on the rights of the individual, zealously and categorically asserting the sanctity of the First Amendment. In Miranda v. Arizona, the Warren Court spoke clearly to how due process must be followed for all people and how the legal establishment must ensure that this due process element is maintained for all individuals regardless of personal interpretation. In Mapp v. Ohio, the Warren Court spoke to how the 4th Amendment protecting lawful search and seizure must be specific and absolute, not subject to interpretation. These decisions made very clear the Warren Court's legacy to ensure that the most fundamental elements of the Bill of Rights apply to all Americans in both spirit and letter of the law.