FOR years the more moderate citizens of Berkeley, Calif., urged the town's sizable radical element to drop the politics of confrontation and try to work within the system. With a well-organized campaign, the radicals did just that. By the scant margin of 56 votes, Berkeley last week elected its first black mayor: Warren Widener, 33, a suave former city council member and protégé of radical Black Congressman Ronald Dellums. The insurgents also gained three of four available seats on the city council, bringing it to an even 4-4 split between leftists and moderates.
The victory scarcely signified a revolution in Berkeley politics....