Joanna Macy is best known today as a Buddhist scholar and philosopher of ecology. Krista Tippet, host of the radio program, On Being, first came across Macy as the translator of the poetry of Rainer Maria Rilke. Macy's varied and adventurous life included working for the CIA in Cold War Germany, and, as a young mother, moving to post-colonial India, where she cared for Tibetan refugees, joining the young, newly exiled Dalai Lama. Later, she became an environmental activist. Learn more about Macy in this fascinating in-depth interview.