In the first major examination of the diverse European efforts to colonize the Delaware Valley, Mark L. Thompson offers a bold new interpretation of ethnic and national identities in colonial America. For most of the seventeenth century, the lower Delaware Valley remained a marginal area under no state's complete control. English, Dutch, and Swedish colonizers all staked claims to the territory, but none could exclude their rivals for long in part because Native Americans in the region encouraged the competition. Officials and settlers alike struggled to determine which European nation would...