Final answer:
Francis Galton can be credited with providing the idea of eugenics to psychological science.
Step-by-step explanation:
Although Francis Galton was not able to develop a simple measure of intelligence, he can be credited with providing psychological science with the idea of eugenics. Eugenicists sought to demonstrate that lighter-skinned races were more evolved, using techniques such as measuring brain size. However, most scientists distanced themselves from eugenics due to its racial assumptions and lack of scientific integrity.