Justice Brennan filed a lengthy and historically significant concurrence, taking seventy-three pages to elaborate his ideas about what the Framers intended in the formation of the First and Fourteenth Amendments, gauging the value of religion in American culture, reviewing legal precedents, and suggesting a course for future church-state cases. Brennan focused on the history of the Establishment Clause to counter numerous critics of the Court's Engel decision, who pointed out that prayer in public schools, as well as in many other areas of public life, was a longstanding practice going back to the framing of the Constitution and Bill of Rights. He professed to be aware of the "ambiguities in the historical record",[9] and felt a modern-day interpretation of the First Amendment was warranted.