The question is incomplete. The complete question is as follows;
Explaining the existence of aggression and violent behavior as positive adaptive behaviors in human evolution; these traits allowed their bearers to reproduce disproportionately, which has had an effect on the human gene pool.
Answer:
Evolutionary theory.
Explanation:
The evolution may be defined as the change in the species with time. The evolutionary history can be solved on the basis of molecular evidence, biochemical evidence and fossil evidence.
The evolutionary theory explains the adaptation that might have occur in the individual due to change in the environment. These adaptation are positive for the population and best adapted individual reproduce more than the less fit individual and can transfer their beneficial gene to the next generation. This creates the difference in the human gene pool.
Thus, the answer is evolutionary theory.
