Richard Ned Lebow provides an analysis of the historical causes and consequences of war. He argues that war should become less frequent in the future because territorial conquest has become more difficult and costly, reducing the incentive to make war for material rewards.

Four generic motives have historically led states to initiate war: fear, interest, standing, and revenge. Using an original data set, Richard Ned Lebow examines the distribution of wars across three and a half centuries and argues that, contrary to conventional wisdom, only a minority of these were motivated by security or material interest. Instead, the majority are the result of a quest for standing, and for revenge - an attempt to get even with states who had previously made successful territorial grabs. Lebow maintains that today none of these motives are effectively served by war - it is increasingly counterproductive - and that there is growing recognition of this political reality. His analysis allows for more fine-grained and persuasive forecasts about the future of war as well as highlighting areas of uncertainty.