From: Nature
But those with siblings are more selfish than those without
Children become more egalitarian as they get older, learning the principles of equality by the age of eight, according to a study by Swiss scientists. That may not be too surprising to anyone who has kids – but the researchers also found that having older siblings actually tends to make children more selfish, and that children with no siblings are the least selfish. Link to read article
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Source: Published online 27 August 2008 | Nature |