Evolutionary psychology is an interdisciplinary field of study that dates back to Charles Darwin; growing out of his benchmark book,
On the Origin of Species
(1859). Those in the field seek to understand the evolution of the social mind by theorizing about and testing hypotheses related to various selection pressures that led to current evolved psychological mechanisms in humans. Evolutionary psychology has been used to explain interpersonal processes including survival, mating, verbal and nonverbal communication, cooperation, competition, and kinship. Current research in evolutionary psychology weaves together biological, psychological, social, and cultural explanations for attitudes and behaviors into one cohesive body of evidence for the explanation and prediction of human psychological dynamics, many of which are at the root of interpersonal and relational communication phenomena.