Candid photograph of Pfeffer at 36 years old at a podium speaking at the Milton S. Eisenhower Symposium.

Candid photograph of Percy, a senior senator from Illinois, speaking to two men at the Milton S. Eisenhower Symposium.

Candid photograph of Percy speaking from a podium at the Milton S. Eisenhower Symposium.

Candid photograph of Percy speaking from a podium at the Milton S. Eisenhower Symposium.

Candid photograph of Levy, on the left, standing beside Copland.

Candid photograph of Fuller standing among a group of seated people.

Candid photograph of DeSoto at approximately 45 years old holding a book.

Candid photograph of DeSoto at approximately 45 years old holding a book.

Candid photograph of Cox lecturing at the 1973 Milton S. Eisenhower Symposium.

Candid photograph of Commoner at a podium lecturing during the Milton S. Eisenhower Symposium.