High Quality Content by WIKIPEDIA articles! The Selfish herd theory states that individuals within a population attempt to reduce their predation risk by putting other conspecifics between themselves and predators. Such behavior inevitably results in aggregations. The theory was proposed by W. D. Hamilton in 1971 in an attempt to explain the gregarious behavior witnessed by a variety of animals. It contrasted the popular hypothesis that evolution of such social behavior was based on mutual benefits to the population. The basic principle governing the Selfish Herd Theory is that in aggregations, predation risk is greatest on the periphery and decreases toward the center. More dominant animals within the population are supposed to obtain low-risk central positions, whereas, subordinate animals will be forced into higher risk positions. Many researchers have used this idea to explain why populations at higher predation risks often form larger, more compact groups. It also may explain why...

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