Muhammad Yunus' ideas about lending to the poor have changed lives in his native Bangladesh and beyond.

Yunus, winner of the 2006 Nobel Peace Prize, has helped people rise above poverty by giving them small, usually unsecured loans through his Grameen Bank.

Now Yunus has written about his next big idea in Creating a World Without Poverty: Social Business and the Future of Capitalism. He calls his vision "social business" — a model where entrepreneurs can apply their creative, social and altruistic vision to the world's most pressing problems, such as poverty and homelessness.

Excerpt: 'Creating a World Without Poverty'

Prologue: Starting With a Handshake

"A social business? What is that?"

"It's a business designed to meet a social goal.

a business that pays no dividends.

It sells

at prices that make it self-sustaining.

The owners

get back the amount they've invested

but no profit

any profit made stays in the business

to do more good for the world.