life: On the eve of the Super Bowl, LIFE pays tribute to that changeable male ideal: the American tough guy. (Photo: Bill Eppridge

life: On the eve of the Super Bowl, LIFE pays tribute to that changeable male ideal:

life: On the eve of the Super Bowl, LIFE pays tribute to that changeable male ideal: the American tough guy. (Photo: Bill Eppridge—Time & Life Pictures/Getty Images)

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