Ignoring the morality of eating animals, on the subject of the animals, raising animals as/for food is horrible for the environment.

Cows/pigs/ships contaminate water sources.

Mammals fart, which in big enough numbers is pushing global warming.

The resources used to prepare one meal from an animal can be used to make up-to 100 meals from plants.

This effects everyone, no one is above global warming, yea the poor will be screwed more then the rich, but everyone are screwed. So avoiding eating animals for this reason alone in your self interest (unless you are going to die soon).

Food prices mostly affect poor people, and less so in richer countries, those that can afford to eat enough meat make global changes in the economy will be effected by it, so it goes to morality (do you care that your enjoyment of eating dead animals might starve someone to death ?).

There is also the subject of heart problems and colon cancer, you are less likely to die from them if you go vegan.

I think those are the main topics of eating animals, from there it's a personal choice, do I care about my heart ? do I care about global warming ? people less fortunate then me ? can I handle the social aspects of going vegan ? can I handle the mental changes required to change my diet ?