Interesting question, that I reflect upon quite often.
On one hand, such path most certainly will lead to a better future for mankind: we would stop killing which is already good, we would stop producing so much CH4 which is for some reason ignored by the mass media that propagandizes global warming, we would lower our most common and lethal diseases like cancer, strokes, diabetes etc.
On the other, people at this age are extremely ignorant to acknowledge all of these simple facts, because of authoritarian traditions that we're tought since we're young. People need to develop critical thinking in order to become vegetarian. A conformist society is bound to degrade and swarm in rot and decay.