Peter Anthony Dale Collier (1939-2019) was an American writer, journalist, editor, publisher, author, and political commentator renowned for his dramatic ideological shift from radical left-wing activism to conservatism. Born on June 2, 1939, in the United States, he initially pursued an academic career in English literature, teaching at the University of California, Berkeley while working on a Ph.D. thesis focused on Jane Austen. In 1966, he joined the influential radical left-wing Ramparts magazine as an editor, contributing splashy, four-color pieces that helped transmit New Left ideas, including coverage of the Black Panthers and other countercultural movements, into the mainstream during the turbulent 1960s. His political evolution became a defining aspect of his career, leading him to collaborate extensively with former radical David Horowitz, a close friend and professional partner. Together they co-authored critically acclaimed books such as 'Destructive Generation: Second Thoughts About God, Country, and That Ticket to Ride' (1989) and 'The Anti-Chomsky Reader' (2004), which reflected their disillusionment with the New Left and embrace of conservative principles. This partnership extended to co-founding the David Horowitz Freedom Center, a conservative think tank and advocacy organization focused on combating leftist ideologies and promoting anti-communist perspectives. In 1998, Collier founded Encounter Books, a conservative publishing house initially based in San Francisco, California, serving as its publisher until resigning in 2005 when the company relocated to New York City and he was succeeded by Roger Kimball. His work spanned over five decades, marked by editing, writing, publishing, and influential commentary on politics, culture, and ideology in conservative circles. Collier's legacy lies in his personal and intellectual journey, embodying broader shifts within American political thought from the counterculture era to modern conservatism. He remained active until his death on November 1, 2019, leaving behind a body of work that critiqued extremism on both sides of the spectrum.