The United States is undergoing a period of intense political and social change. From the rise of the Tea Party to social media's effect on American life and politics, this new edition fills in the gaps of this nation's story. This book guides you through the events that shaped the nation, from pre-Columbian civilizations to the 21st century. It's all here—you'll find all the wars, leaders, and eras that explain and demonstrate how the past influences the future.