Sri Aurobindo's principal work of philosophy.

In this book, Sri Aurobindo presents a theory of spiritual evolution and suggests that the present crisis of humanity will lead to a spiritual transformation of the human being and the advent of a divine life upon earth. The material first appeared as a series of essays published in the monthly review Arya between 1914 and 1919. They were revised by Sri Aurobindo in 1939 and 1940 for publication as a book.