Inclusive fitness vs altruism

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Altruism is doing something for someone else without a clear benefit to you. Inclusive fitness is a mechanism to explain why altruism can be evolutionarily advantageous.

https://en.wikipedia.org/wiki/Inclusive_fitness

If you scroll down this wikipedia page, there is a section called "inclusive fitness and altruism"
 
I think of inclusive fitness as being more to do with game theory, whereas altruism is a little more self explanatory.
 
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