(2007) and Bonjean and Angus (2001) Absolute latitude Richness of both native and non-native weeds decreases with latitude (Willig et al. The longer the length of cultivation the greater the total number of weeds and proportion of native species in the flora Bellwood et al. Based on the details of our models, we conclude that ecology probably helped shape the geography of agriculture by biasing both human movement and the human-assisted dispersal of domesticates. Leveraging a globally distributed dataset on 1,291 traditional societies, we show that after accounting for the effects of cultural transmission and more current ecological opportunities, levels of reliance on farming continue to be predicted by the opportunities local ecologies provided to the first human domesticates even after centuries of cultural evolution. Here, we investigate how recent agricultural practices relate both to contemporary ecological opportunities and the suitability of local environments for the first species domesticated by humans. However, this seemingly simple proposition has been surprisingly difficult to prove and is currently controversial. Given the critical importance of climate and biotic interactions for modern agriculture, it seems likely that ecological conditions could have played a major role in determining the degree to which different societies adopted farming. Despite these positive effects, some societies never adopted these practices, became only partially reliant on them, or even reverted to foraging after temporarily adopting them. The evolution of agriculture improved food security and enabled significant increases in the size and complexity of human groups.
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