Conversation so far:
What are David Rockefeller's political connections?
At times David Rockefeller served as an unofficial emissary on high-level business. Among the foreign leaders he met were Saddam Hussein, Fidel Castro, Nikita Khrushchev, and Mikhail Gorbachev.

Question: What else did he do?
Self-contained rewrite: What else did David Rockefeller do besides serve as an unofficial emissary?