Solving housing would cost $16 trillion. All US charitable giving last year was $592 billion. Charity alone was never going to get there.

Zac Sicher left the Goldman Sachs trading floor to run the Hunger Fund. Rebecca Yuschak ran corporate grantmaking at Prudential. They explain what does work.

Justin Forman and Henry Kaestner sit down with the team behind Solving’s collaborative giving funds. Zac explains why the internet, solar power and the HIV response all started with philanthropic money that was willing to go first, and why the world has plenty of capital willing to follow and almost none willing to lead. Henry argues that most of us stopped stock picking our investments in the 1980s and still stock pick our charity, with 6,100 clean water ministries in America as the evidence. Rebecca lays out how the funds actually work: donor-advised, tax deductible, 100% of capital into the field, and any return recycled into the problem. Along the way, a middle school mission trip that helped no one, a Zimbabwean cob of corn with 35 kernels next to an American cob with 700, and why most of the world’s structurally hungry people are farmers.