“Historically, philanthropists have put a limit on their impact by working alone. But that’s starting to change. Groups like the Audacious Project, Co-Impact, Blue Meridian Partners, Lever for Change, and the Climate Leadership Initiative are making it easy for donors to pool their money and share their expertise. They can absorb large grants—from $10 million to $100 million or more—and fund really smart solutions to big social problems like poverty, education, and climate change.”