Develops a model that can reproduce the basic features of the European state-system based on the assumption that wars farther removed from the center of power are more difficult to win.

Proposes an economic-growth model that adheres to the salient features of the European economies during the millennium prior to the Industrial Revolution and shows how the Industrial Revolution, generated by the model, can be conceptualized as an escape from the Malthusian trap.

Proposes an economic-growth model that adheres to the salient features of the European economies during the millennium prior to the Industrial Revolution and shows how the Industrial Revolution, generated by the model, can be conceptualized as an escape from the Malthusian trap.