Problem: The cognitive revolution and the rapidly growing field of biological psychology guarantee that only personality theories that consider both internal and external factors will endure in the future. "Cognition" involves the internal interpretation of external events. Cognitive processes both influence and are influenced by external events. Similarly, neurological, genetic, and other internal biological processes both influence and are influenced by external events. Therefore, we cannot determine whether external or internal factors cause personality. This debate is over. In a similar manner, we cannot decide between genetic and environmental causation. Genes manifest in environments that can alter the expressions of the traits controlled by the genes. Under genetic influence, environments can be modified. Thus, it is time to end another debate. "The nature/nurture debate is over," and this is a widely quoted statement from a behavioral geneticist in one of psychology's most prestigious journals. Rewrite. Need Assignment Help?