A few days ago, the population of the world reached 8 billion. When I was born, in 1958, it was 2.9 bn.
The carrying capacity of the Earth is thought to be around 1.5 bn, which we reached around 1885. Since then, we have been depleting its resources.
Deaths, largely due to disease and famine, will rise to meet the birth rate around 2070 when there will be around 9.4 bn inhabitants.