Liberals and uncharitableness

In the United States there is evidence to support the position that liberals are uncharitable relative to conservatives. In March of 2008, George Will wrote at RealClearPolitics:

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Sixteen months ago, Arthur C. Brooks, a professor at Syracuse University, published "Who Really Cares: The Surprising Truth About Compassionate Conservatism." The surprise is that liberals are markedly less charitable than conservatives.... If many conservatives are liberals who have been mugged by reality, Brooks, a registered independent, is, as a reviewer of his book said, a social scientist who has been mugged by data. They include these findings: -- Although liberal families' incomes average 6 percent higher than those of conservative families, conservative-headed households give, on average, 30 percent more to charity than the average liberal-headed household ($1,600 per year vs. $1,227). -- Conservatives also donate more time and give more blood.

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