Rebellion, insurgency, civil war-conflict within a society is customarily treated as a matter of domestic politics and analysts generally focus their attention on local causes. Yet fighting between governments and opposition groups is rarely confined to the domestic arena. "Internal" wars often spill across national boundaries, rebel organizations frequently find sanctuaries in neighboring countries, and insurgencies give rise to disputes between states.

In Rebels without Borders, which will appeal to students of international and civil war and those developing policies to contain the...

Recent American foreign policy has depended heavily on the use of negative inducements to alter the behavior of other states. From public browbeating through economic sanctions to military invasion, the last several presidents have chosen to use coercion to advance U.S. interests when dealing with adversaries. In this respect, as Miroslav Nincic notes, the United States differs from many of its closest allies: Canada has long maintained diplomatic relations with Cuba, and several of the European democracies have continued diplomatic engagement with governments that the United States...

Rebellion, insurgency, civil war-conflict within a society is customarily treated as a matter of domestic politics and analysts generally focus their attention on local causes. Yet fighting between governments and opposition groups is rarely confined to the domestic arena. "Internal" wars often spill across national boundaries, rebel organizations frequently find sanctuaries in neighboring countries, and insurgencies give rise to disputes between states.

In Rebels without Borders, which will appeal to students of international and civil war and those developing policies to...