This is a fascinating claim with far reaching consequences for modern humans dealing with the Anthropocene polycrisis.
Technological development seems to have been related to our resource overshoot. As we extirpated the larger prey fauna which were slower moving and able to be successfully hunted with crude weapons, our ancestors were forced to hunt smaller and more agile species, requiring better hunting technologies.
Agriculture could have been the only option left to our ancestors when there was insufficient species left to support society. This is the most salient sentence:
"we confirmed the hypothesis that the extinction of large animals was caused by humans -- who time and time again destroyed their own livelihood through overhunting. We may therefore conclude that humans have always ravaged their environment but were usually clever enough to find solutions for the problems they had created"
This is a disturbing finding as technology has allowed humanity to be the apex species of the planet and we are now depleting resources not on a local scale, but a global one. There is no planet B to move to once we have decimated the environment globally.
Have we progressed ourselves into a corner? Are we able to culturally pivot and correct such an entrenched cultural behavior of resource mismanagement?