This book examines left politics in India focusing on its rise, consolidation and relative decline in the present century. Left radicalism in India is a distinct ideological phenomenon which is articulated in two complementary ways: while the parliamentary left remains social democratic in character, its bête noire, the left wing extremists, continue to uphold the classical Marxist, Leninist and Maoist notion of violent revolution. By concentrating on the nature and also activities of these two versions of left radicalism, this book is a thorough study of the phenomenon. The author analyses the states of Kerala, West Bengal and Tripura and presents a variety of case studies of communist movements.