The second era of the school was led by Fernand Braudel and was very influential throughout the 1960s and 1970s, especially for his work on the Mediterranean region in the era of Philip II of Spain. Braudel developed the idea, often associated with Annalistes, of different modes of historical time: "l'histoire quasi immobile" (motionless history) of historical geography, the history of social, political and economic structures ("la longue durée"), and the history of men and events, in the context of their structures. His 'longue durée' approach stressed slow, and often imperceptible effects of space, climate and technology on the actions of human beings in the past. The "Annales" historians, after living through two world wars and major political upheavals in France, were deeply uncomfortable with the notion that multiple ruptures and discontinuities created history. They preferred to stress slow change and the longue durée. They paid special attention to geography, climate, and demography as long-term factors. They considered the continuities of the deepest structures were central to history, beside which upheavals in institutions or the superstructure of social life were of little significance, for history lies beyond the reach of conscious actors, especially the will of revolutionaries.