Even government is getting into the act, Reich said, with the creation of the White House Office of Social Innovation, which seeks to create new types of partnerships between government and the private sector, and between government and the public sector.
The "Investing in Innovation Fund" of the Department of Education involved 12 foundations, including the Gates and Hewlett foundations, which contributed $500 million to the department to unlock $650 million in federal funds.
"Now there's a genuinely novel idea," Reich said. "Foundations making grants to the federal government."
Because of this blurring of boundaries between the traditional three sectors, the new social economy offers today's graduates a host of choices in "doing good."
"If you aim to do good and pursue a social cause, you can be sector agnostic: It doesn't matter what sector – public, private, civil society – one enters," he said. "That is an amazing new world and quite possibly a brave new world."