"What they built is a pretty extraordinary thing, and I just want to keep supporting it as long as I can," said Hoffman. "Hopefully from year to year it will keep building upon what they left, so that's why I'm here."
Hoffman said that in choosing his own roles, he's always been surprised about the films that have had a lasting impact.
"I never know what films will have an impact either socially or politically," he said. "It's a tough one, because sometimes things can be too on the nose. You hope you're involved with things that will just make an impact, that will affect people somehow. Sometimes that's socially or politically, and sometimes that's just soulfully."
, a longtime activist even before his paralyzing accident in 1995 when he was thrown from a horse in an equestrian competition, used his own celebrity for good causes ranging from the Make-a-Wish Foundation, to Amnesty International, to the Natural Resources Defense Council.