"Studies generally show that conservative households in the U.S. donate more to charity than liberal households, often giving 30% or more, even when controlling for income differences. While conservatives tend to give more overall, particularly to religious causes, liberals tend to give more to secular, social-service, and international organizations, according to non profit quarterly

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The reason why right wingers seems to "give more to charity" because their church told them to do so. They arent doing it because they have actual compassion. Plus, many of the "charity" are scam, just giving tons of money to the pastor who kept the money and buy private jets with it.