This book analyses the genesis and process through which transatlantic strategic dissonance now defines a divided West. It contends that constructive strategic dissonance has the potential to best manage a complex and pressing global security agenda. * Reflects on the bitter disputes that have crystallized across the Atlantic after 9/11 and the rise of terrorist, WMD and failed state threats. * Structured around the concepts of 'Atlantic', 'Core', 'New' 'Non-aligned' and 'Periphery' Europe that have emerged in the wake of these disputes. * Identifies the trends and factors that have driven and could further propel the Euro-Atlantic security community towards different futures. * Analyses the security policy implications of each scenario for states within this region.