"When the Cambrian measures were forming, They promised perpetual peace.
They swore, if we gave them our weapons, that the wars of the tribes would cease.
But when we disarmed They sold us and delivered us bound to our foe,
And the Gods of the Copybook Headings said 'Stick to the Devil you Know.'"

Rudyard Kipling, "The Gods of the Copybook Headings" (1919). The full poem is about the perpetual folly of mankind in forsaking the elemental truths learned in school (the gods of copybook headings) in favor of seductive, but ultimately destructive, utopian teachings (the gods of the market place). For example,

"In the Carboniferous Epoch we were promised abundance for all,
By robbing selected Peter to pay for collective Paul;
But, though we had plenty of money, there was nothing our money could buy,
And the Gods of the Copybook Headings said: 'If you don't work you die.'"