Stew Albert, a prominent anti-Vietnam war activist, an early supporter of the Black Panthers and a founder of the Yippie radical protest group, died Monday at age 66 in Portland, Oregon. The cause was cancer. Mr. Albert was a catalytic figure in the Bay Area's emerging New Left political movement of the 1960s, helping to combine white anti-war activists with Black power advocates and hippies. In 1967, Mr. Albert and fellow radicals Jerry Rubin and Abbie Hoffman formed the Youth International Party, melding serious protest with outrageous street theater satire to stage events that became icons of the era. They...