"When the Rosens moved to New Rochelle in 1973, Jonathan Rosen and Michael Laudor seemed destined to become inseparable. The boys, both children of college professors, grew up on the same street in intellectually vibrant homes shaped by ideas, liberal Jewish culture, the trauma of the Holocaust, and a shared love of basketball and standup comedy. But the two best friends were also keen competitors bearing the same great expectations, and when Michael...