At several points in football's history, the rulemakers have tried to encourage risk-taking by the offense. For example, from the mid-1910s through the 1920s, various coaches sought ways to incorporate more rugby-style lateraling into their offenses.
In the mid-1910s, Canadian rugby combined elements of American football and English rugby. Since it did not yet allow blocking or the forward pass, rugby style laterals were a primary means of advancing the ball on the ground.

Their methods caught the eye of Yale's Frank Hinkey in 1914, when, as the new coach there, he visited a Canadian rugby team or two and invited some of them to watch Yale's football practices and games, trying to pick up a few ideas.
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