"The Complementary Nature is a genuinely fascinating, provocative, and unique book. It rises to the challenge of describing how either/or thinking obscures the in-between dynamic realities that constitute life itself and in turn how these realities rest on complementary rather than oppositional pairs. In the process, it breaks new ground and opens fresh terrain for future research by illuminating ways in which the science of coordination dynamics-from the study of brains to the study of behavior-offers new paths for understanding the nature of human nature."
-- Maxine Sheets-Johnstone, author of The Primacy of Movement

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 Engstrøm contend that ubiquitous contraries are complementary and propose a comprehensive, empirically based scientific theory of how the polarized world and the world in between can be reconciled. They nominate the tilde, or squiggle (~), as the symbolic punctuation for reconciled complementary pairs.