Each book in the Thinking Aloud series will ask one simple question— one that ancient philosophers, song writers, poets, playwrights, scientists, theologians, jurists, world leaders, and others have tried to answer throughout human history. The aim of these books is to get kids to think critically, after considering answers from some of the greatest thinkers of today and yesterday. Each title includes thought provoking prompts, timelines, glossaries, and interesting sidebars. Black and white and color photos are found throughout each book. Additional web sites and further reading are also included.