claim: The Stanford prison experiment was an investigation into the causes of difficulties between guards and civilians.
evidence: The Committee on the Present Danger -LRB- CPD -RRB- is an American foreign policy interest group .. American. United States. foreign policy interest group. foreign policy interest group. Its current stated single goal is `` to stiffen American resolve to confront the challenge presented by terrorism and the ideologies that drive it '' through `` education and advocacy '' .. American. United States. Throughout its three iterations -- in the 1950s , the 1970s , and the 2000s -LRB- decade -RRB- , it influenced the Presidential administrations of Harry Truman , Dwight D. Eisenhower , Jimmy Carter , Ronald Reagan , and George W. Bush , and was still active .. Harry Truman. Harry S. Truman. Dwight D. Eisenhower. Dwight D. Eisenhower. Jimmy Carter. Jimmy Carter. Ronald Reagan. Ronald Reagan. George W. Bush. George W. Bush