The transhumanist threshold is the degree of particular personal traits which, if a person exceeds them, causes said person to modify the genes of one's offspring, which in turn amplifies those traits in the future generations at a much higher rate than does natural selection. Said traits are intelligence and conscientiousness. The degree of intelligence required is higher than that of the eugenic threshold, due to the technological requirements of genetic modification.

This is a factual article as opposed to fiction or scenario. It describes the current state of the field and explains expected future developments without speculation or fantasy.