Book Excerpt: 'The Power of Half,' by Kevin and Hannah Salwen

Feb. 8, 2010— -- Joan and Kevin Salwen were living a "standard American life" -- until their 14-year-old daughter convinced them they should sell their Atlanta home, downsize their lifestyle and give the money to a charity. This one act set off a chain reaction that would lead the Salwens down a new path, opening themselves to new experiences, and bringing them together as a family.

Read and excerpt of their new book "The Power of Half" below.

Watch World News with Diane Sawyer tonight on ABC for more on this story.

Introduction:

Our family is a fairly typical Atlanta foursome: two baby boomers (Joan and Kevin) and two teenagers (Hannah and Joseph). Our days consist of the standard American life — school, work, and youth sports. For more than a decade we aspired to the usual: new cars, a spacious home, nice vacations. Sure, we took on the occasional volunteer activity, feeding the homeless and building Habitat for Humanity houses, but largely we were consumed by our careers and enhancing our lifestyle through bigger, newer, better. We were focused on us. We moved into a huge "Dream House," large enough for us to scatter in different directions. As we drove from activity to activity, the TV in the back seat kept the kids entertained — and our family from connecting. At dinner, conversations began to center on to-do lists instead of meaningful dialogue. Our sense of togetherness was beginning to erode. I can't pinpoint the moment it happened because, after all, erosion is so much harder to recognize than earthquake damage. Still, when we stopped to take a hard look, it was clear that we were drifting apart. We were losing our core.

Then our life took an amazing turn.

Prodded by Hannah, who at fourteen had become increasingly upset about the imbalance of opportunities in the world, we launched an audacious family project. We decided to sell our 6,500-square-foot landmark home, move to a nondescript house that was half as big, and donate half of the sales price to help alleviate poverty in one of the neediest corners of the planet. We committed to donating more than $800,000 for work in two dozen villages in Ghana — a place we not only hadn't visited, but one so foreign to us that we had to look it up on the map.