"Radical Son" is a memoir by David Horowitz, an American author and political activist. The book chronicles his journey from a leftist youth involved in the New Left movement to a conservative commentator. Horowitz reflects on his experiences in the 1960s, including his relationships with prominent figures in the radical movement. In the memoir, Horowitz explores themes of ideological transformation and the impact of political beliefs on personal relationships. He discusses the disillusionment he faced as he witnessed the consequences of radical politics, ultimately leading him to embrace conservative values and critique the very movements he once supported.