Final answer:
Jimmy Carter is the U.S. president known for making human rights a key aspect of his foreign policy and for pressuring allies to improve their human rights records.
Step-by-step explanation:
The president who first made human rights central to foreign policy and pressured US military allies to improve human rights was Jimmy Carter. Carter believed that U.S. foreign policy should reflect deeply held moral principles and national values. Though he faced criticism for his approach, his dedication to peace and human rights significantly altered United States foreign policy. Under his leadership, relations with China improved, military support to certain dictators ended, and the groundwork was laid for historic treaties, such as the peace treaty between Israel and Egypt following the Camp David Accords.