@article {1335099,
	title = {Human Cooperation: The Hunter-Gatherer Puzzle},
	journal = {Current Biology},
	volume = {28},
	number = {19},
	year = {2018},
	pages = {R1143-R1145},
	url = {https://www.cell.com/current-biology/fulltext/S0960-9822(18)31050-9},
	author = {Henrich, J.}
}
