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Introducing Genetics Unzipped
Big Biology
Is Cannibalism Really Common in Nature?
Many biologists thought cannibalism was rare in nature because of all these costs, the risk of disease or injury. Disease is a powerful force in evolution and as it's much easier to become infected by eating an individual of your own species than a different species, this should make it much harder for cannibalistic behaviors to evolve. They thought any cannibalism they saw must be a last resort, an act of extreme starvation. The more they looked, the more they saw that cannibalism is actually very common in nature.
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