Each identity has free will and chooses its environment as a physical stance in space and time. Those involved in a given century are working on particular problems and challenges. Various races do not simply 'happen,' and diverse cultures do not just appear. The greater self 'divides' itself, manifesting in flesh as several individuals, with entirely different backgrounds, yet each embarked on the same kind of creative challenge.

p. 136 - Psychic Politics: An Aspect Psychology Book, (1976)