Frederick Delano Newman was born in the Bronx on June 17, 1935, and grew up there. At 19, he joined the Army and served in Korea. He graduated from the City College of New York and earned a Ph.D. in philosophy from Stanford in 1962. His influential role in New York life and politics defied easy description. He founded a Marxist-Leninist party, fostered a sexually charged brand of psychotherapy, wrote controversial plays about race and managed the presidential campaign of Lenora Fulani. He helped the Rev. Al Sharpton get on his feet as a public figure and gave Michael R. Bloomberg the support of his Independence Party in three mayoral elections He insisted, for instance, that there was nothing wrong with psychotherapists having sex with patients. He created an empire of nonprofit and for-profit enterprises, including arts groups and a public relations firm. He wrote books on psychology and philosophy as well as plays. After forming his Upper West Side collective, Mr. Newman, in 1974, allied his group with Lyndon H. LaRouche Jr., originally a leftist leader who veered to right-wing conspiracy theories and ran for president eight times from the political fringe. He then formed the International Workers Party from what he called his core collective, with a mission to advance minority rights and a leftist agenda. The party was dissolved at the end of the 1970s. Mr. Newman then founded the New Alliance Party as a vehicle for moving beyond a narrow leftist spectrum. In 1991, the New Alliance Party gave strong support to Mr. Sharpton, then a community advocate, at a time when he was struggling for broader political recognition. His final cause was to end the two-party system, which he believed stifled real choice. He wanted primary elections to be open to all parties, and to have all candidates run against one another. The top two would vie in a general election.