Evolution never stops; it changes directions!
If you’re lucky enough to live in a developed country, you probably don’t have to worry about starving to death. That doesn’t mean the end of natural selection. In fact, it might be beneficial to lose the coping mechanisms for starvation in our modern age of caloric excess. Natural selection could be pushing evolution in the direction of thinner people, or people who suffer fewer health effects from carrying a lot of fat.
As long as people reproduce (even if they are only having one or two children), people will evolve.