Why do we divide our world into contraries? Why do we perceive and interpret so many of life's contraries as mutually exclusive, either/or dichotomies such as individual~collective, self~other, body~mind, nature~nurture, cooperation~competition? Throughout history, many have recognized that truth may well lie in between such polar opposites. In The Complementary Nature , Scott Kelso and David Engstrm contend that ubiquitous contraries are complementary...