Пре­об­ра­зуй­те, если это не­об­хо­ди­мо, слово DO так, чтобы оно грам­ма­ти­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

Samuelson’s life work has been to use economics in the service of humanity. He ______ more than anyone of his time to influence government policy at the highest level.