"In the 18th Century, that model of religious tolerance based on a state with diverse cultures, but no single dominant religion, became a model for the founding fathers, " said Mr Raby.

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It was such a disaster that the Founding Fathers decided to move to a distributed, free-banking model for the new United States.

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Lastly, Fritz said that many perpetrators of such crimes don't have fathers -- and, in some cases, any adult male role model -- in their lives.

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But when you speak to mothers and fathers back in Sweden, most do appear fully sold on the country's public preschool model.

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