BY INVADING CAMBODIA and referring to students, just after the Kent State killings, as “bums,” President Nixon gave the radical movement a new lease on life; the movement depended on him for its life. For one of the most important features of the counterculture is its volatility; it constantly takes new directions, abandons old heroes, seeks new excitement. To clarify this point, we may distinguish three elements: the youth culture, the movement, and radical politics. 15