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Since many religious organizations require a form of tithing/alms/donations etc. as confirmation of ones faith (or at least an act trying to prove it) this article and its premise are not really surprising. The bible and many who follow the fundamental/orthodox teachings believe that 10% of their income is to go to the church. I'm not sure about anyone else but I believe the definition of altruism is doing something without the expectation of anything in return. This includes salvation or any sort of recognition for one's efforts.
Read the Article at HuffingtonPost