Over the past several decades, the sciences have witnessed a significant paradigm shift. Our traditional notions of order, energy, causality and methodology have all been upended. A new set of views has arisen that enables us to better understand and examine the complexity of nature. In this perspective, behavior is nonlinear, order emerges spontaneously and responses are best understood as the movement of trajectories through multi-dimensional space. This book examines the role that dynamical systems, complexity science, networks, and fractals play in helping to explain the most difficult thing of all: ourselves.