In this chapter, I provide an overview of the field of evolutionary psychology. I begin by introducing the gene’s-eye view of evolution. To do this, I run through a series of hypotheses about what organisms are “designed” by natural selection to do, critiquing each in turn and moving closer with each step to the modern gene’s-eye view. The hypotheses are that human beings are designed to perpetuate the species, to survive, to reproduce, to have grandchildren, to maximize their inclusive fitness, and finally to pass on their genes. I next argue that evolutionary principles apply not only to the body but also to the mind. For example, just as we evolved eyes to see and ears to hear, we evolved fear to protect us from danger, sexual desire to lead us to have offspring, and parental love to motivate us to care for those offspring. Each of these traits is an adaptation, just as much as eyes and ears are. Also in this chapter, I outline two non-adaptationist evolutionary explanations, namely evolutionary mismatch and the byproduct hypothesis. And I discuss recent, rapid evolution in our species, and argue for an expanded conception of the environment of evolutionary adaptedness (or EEA).