noun. 1. the theory postulating that the evolution of a species adheres to a direction deemed by aspects inherent to the living beings and that subsequent generations adhere to the same format irrespective of natural selection. 2. the theory postulating that all societies pass by way of the same sequential phases.
ORTHOGENESIS: “In accordance with orthogenesis, you’ll go through the same stages in life as someone from a different culture, living in an extremist society governed by strict rules, practicing a vastly different religion.”