The Black Death is a vivid example of a critical juncture, a major event or confluence of factors disrupting the existing economic or political balance in society. A critical juncture is a double-edged sword that can cause a sharp turn in the trajectory of a nation. On the one hand it can open the way for breaking the cycle of extractive institutions and enable more inclusive ones to emerge, as in England. Or it can intensify the emergence of extractive institutions, as was the case with the Second Serfdom in Eastern Europe. Understanding how history and critical junctures shape the path of economic and political institutions enables us to have a more complete theory of the origins of differences in poverty and prosperity. In addition, it enables us to account for the lay of the land today and why some nations make the transition to inclusive economic and political institutions while others do not. T