I watched a TV documentary about how animals are farmed, killed and prepared for us to eat. I saw all those cows and pigs and realized I couldn't be a part of it any more. It was horrible. I did some research to make sure I could still obtain enough protein to fight and, once satisfied that I could, I stopped. I'll never go back.
In my day a reporter who took an assignment was wholly on his own until he got back to the office, and even then he was little molested until his copy was turned in at the desk; today he tends to become only a homunculus at the end of a telephone wire, and the reduction of his observations to prose is commonly farmed out to literary castrati who never leave the office, and hence never feel the wind of the world in their faces or see anything with their own eyes.
My dad farmed, my granddad was a farmer. I wanted to be a farmer.
Starvation does not occur because of a world food shortage. If everyone ate a vegetarian, or better still, a vegan diet there would be enough food for everyone. The only sane way forward is to grow food for humans rather than to feed it to farmed animals.