At its most basic level, intergroup contact theory contends that we can reduce prejudice between groups by encouraging interactions between them. Though we explore many caveats and complexities involved in contact effects throughout this book, this basic premise of contact theory is well-supported by an ever-growing research base. Indeed, over the last several decades, literally hundreds of studies have shown that intergroup contact can reduce prejudice (see Pettigrew & Tropp, 2006, for a review).