Familiarity reduces insecurity, so we feel more comfortable describing and combating the risks we think we understand: terrorists, immigrants, job loss or crime. But the true sources of insecurity in decades to come will be those that most of us cannot define: dramatic climate change and its social and environmental effects; imperial decline and its attendant 'small wars'; collective political impotence in the face of distant upheavals with disruptive local impact. These are the threats that chauvinist politicians will be best placed to exploit, precisely because they lead so readily to anger and humiliation.