Lucky Luke - Volume 82 - Rin Tin Can's Ark

Arriving in Cattle Gulch, Lucky Luke runs into an unexpected scene:
an apparent crackpot called Ovid Byrde is about to get lynched. The
man’s revolutionary opinions – animal welfare and the sanctity of
life – aren’t particularly well-received in this town full of
ranchers and cowboys! After Luke intervenes, though, the locals
simply ignore Byrde … until he suddenly finds gold, and a pack of
unscrupulous bandits take advantage of the poor idealist to establish
a vegetarian dictatorship!