Kenneth Earl Wilber II is an American theorist and writer on transpersonal psychology and his own integral theory, a four-quadrant grid which purports to encompass all human knowledge and experience.

Sri Aurobindo was an Indian philosopher, yogi, maharishi, poet, and Indian nationalist. He was also a journalist, editing newspapers such as Bande Mataram. He joined the Indian movement for independence from British colonial rule, until 1910 was one of its influential leaders, and then became a spiritual reformer, introducing his visions on human progress and spiritual evolution.