how can art create change?

here is a short list of some my favorite visual artists who engage in practices that impact the world around them (there are so many more...this is just who comes to mind today):

Lily Yeh

Pepon Osario

JR

FORCE

Vik Muniz

Valeska Populoh 

Luminous Interventions

TT the Artist

Cinder Hypki

Rick Lowe

Paul Rucker

Ai Wei Wei

Emily CD

Fred Wilson

PLEASE ADD TO MY LIST!