There are many ways to feed an increased population. Even now, there is enough overall food to keep everyone from starving. And there is arable land under-utilized. The problem is partly inefficient and unprofitable systems.
And no, I am not a communist. My dinner choices are beef, chicken, shrimp, pork, and lamb (with lots of veggies). There are people starving because I will not give up those choices. I know that. But I still want my steak once a week. I want my nice life.