Do you know that vegetarianism dates back to civilizations of ancient India and ancient Greece?
No way! I'm curious on this now... 
Yes it is true, it's values are based on the  practice of voluntary non-consumption of the flesh of any animal 
I personally like meat, but power to them if they can do it! 
if we look very well we will see that practice  was done amongst a significant number of people concern ancient India and the ancient Greek civilizations in southern Italy and Greece.
So they were afraid they would run out of meat so refused to eat it or just refused to eat it because it is life?
No it was just out of value for life and it's connected with the idea of nonviolence toward animals
How do you personally feel on it?  Are you against it or for it
I am for it. It's a clean practice. Also when  christianization of the Roman Empire in late antiquity  4th-6th centuries, we can see that it almost vanished from Europe
This is a good day, thank you for the information ;)