Main Page | See live article | Alphabetical index Reciprocal altruism is a form of altruism in which one organism provides a benefit to another in the expectation of future reciprocation. It would only be expected to evolve in the presence of a mechanism to identify and punish "cheaters". An example of reciprocal altruism is blood-sharing in the vampire bat. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.