It was the dismantling of such dogmas, beginning in the 1700s and ramping up in the 1800s, that set the stage for the enunciation of Fermi's Paradox in
the 1900s and leads to our growing appreciation for our cosmic Precariousness today.
Humans are naturally omnivorous, and anyone who eschewed animal protein and ate only vegetables in the ancestral environment,
in the face of food scarcity and Precariousness of its supply, was not likely to have
survived long enough and stayed healthy enough to have left many offspring.