@article {1484066,
	title = {The evolution of intergroup tolerance in nonhuman primates and humans},
	journal = {Evolutionary Anthropology: Issues, News, and Reviews},
	volume = {28},
	number = {4},
	year = {2019},
	pages = {210-223},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/evan.21793},
	author = {Anne C Pisor and Martin Surbeck}
}
