We are almost 7 billion now up from just under 2 billion in 1900. The situation is clearly not under control. Unhealthy food, dangerous medical “treatments,” chemicals in the water, radiation, etc… will all do their part to reduce life expectancy and general health. The obesity is a nice benefit because it also serves to limit breeding (fat people don’t have the energy to do as much and have bad self images). Poor diets also reduces people’s strength and mobility, helping keep them docile and easy to control.
If the numbers don’t start coming down quickly enough to curb population growth, some “unexpected” highly contagious diseases will appear soon.