This award-winning economist is credited with bringing down Thailand’s HIV infection rate, lowering its high birth rate, reducing poverty rates, and championing sustainable development ideas that work in rural settings.

Sixteen years after a mostly peaceful transition and elections that brought Nelson Mandela to power, the verdict on South Africa is decidedly mixed.

"Do you want to reconstitute immune systems or do you want to reconstitute lives?" asks Dr. Joseph Mamlin, who runs a clinic in Kenya that now serves over 60,000 patients. "We've decided to go after lives."

Kathi Winter is a busy executive in the travel industry, but every three hours she stops to pop a pill. Winter takes a lot of pills everyday. She's HIV positive, and her "cocktail" of meds keeps AIDS at bay.

Evangelical churches, both black and white, have long been accused of not doing enough to promote HIV/AIDS testing and awareness in their congregations. But Kathi Winter is one evangelical trying to change that. It's a very personal crusade for her - she's HIV positive.

Read more of the R & E interview about religious investing with Fortune magazine writer Marc Gunther, author of FAITH AND FORTUNE: HOW COMPASSIONATE CAPITALISM IS TRANSFORMING AMERICAN BUSINESS.

Thailand's Prabhat Namphu Buddhist monastery is an unlikely combination of two things: AIDS hospice and tourist attraction. Amid a display of cadavers, visitors -- including many school kids -- observe what HIV does to the human body.

If you’re homeless in Washington, D.C. and sick, perhaps close to dying, and you end up in a city shelter, the people who work there might telephone a place called Joseph’s House and ask if they can take you in.

One of the most influential evangelical leaders today is Rick Warren, pastor of Saddleback Church, a megachurch in southern California. Warren is perhaps best known for his mega-selling book, THE PURPOSE DRIVEN LIFE. Since its release in 2002, it has sold more than 25 million copies, making it one of the best-selling books in history. But what is less known is that Warren and his wife Kay have donated most of their earnings to help heal some of the world's worst ills.