How Beavers Evolved to Build Dams

Beavers build dams to help create a deep pond of quiet water, where they then build their home or lodge. A beaver dam is a marvel of engineering that changes the surrounding landscape. But how did this behaviour evolve? And what were the selective pressures that led to the evolution of dam building?
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Reference:
Plint T, et al. Evolution of woodcutting behaviour in Early Pliocene beaver driven by consumption of woody plants. Sci Rep 2020;10:13111.
Credits:
Doug Jones - Nature Videos. vimeo.com/3039...
Doug Jones - Nature Videos. vimeo.com/3643...
James St. John. commons.wikime...
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