THE SIX SYSTEMS The revolt of Buddhism and Jainism helped to bring about a critical point of view and led to the great movement of philosophy which produced the six systems of thought, where criticism and analysis take the place of poetry and religion. The different sys tems are not antagonistic but are complementary. They are re garded as an evolutionary chain, a single and gradually advancing series rather than as destructive of one another. Each of them is a metaphysics and a religion, an explanation of the world and a method of salvation.