In the present article I shall argue that human emotion is multifaceted and has a cognitive dimension in virtue of its intricate connections with beliefs, memories, imagination, and other products of human rationality. Human emotion also has a social and political dimension. When we think about fear we cannot characterize it as a mere stimulus-response phenomenon: it is, due to its cognitive facet, more complex and related to our ideas about survival and well-being. This leaves fear exposed to political rhetoric, (...) and thus to political manipulation. Fear can be aroused, guided and nourished amongst the population, giving rise to a biopolitics of fear. In this article, I will consider the heuristics and biases that lead people to evaluate risks mistakenly, and governments to consequently act erroneously. I will also consider how these psychological mechanisms are exploited by social entrepreneurs in order to achieve their own goals, such as reinforce in-group bonds, generate a sense of crisis or keep hold of power. I shall argue that we must be alert to certain kinds of political discourse that pose a threat to democratic society. (shrink)