What steps should humanity take to prevent the overpopulation of earth?

Prosperity and education is the answer.

If we had No 'third world countries' we would not have a population problem, most prosperous countries like Switzerland, Italy, South Korea, have declining birth rates.

As for resources our solar system has huge amounts, we just have to get space travel/transportation sorted out.

Overpopulation will never stop because 1. Multinational companies require cheap labour to make huge profits. This only works if there is a virtually endless number of desperate people willing to work for next to nothing.

and 2. The whole world ecomony is a pyramid scheme. Governments cannot pay pensions without more and more people working and their pensions won't get paid unless even more people work to pay them. That is why with a declining birth rate , government encourage immigration while pretending to do something about it. Similarly the stock market and housing are also pyramid schemes, requiring more and more to buy in, to give the investors profits.

1) Kill ALL Democrats.

2) Kill ALL Republicans.

3) Kill ALL members of any organised religion.

4) Kill everybody remaining who can not accept that humans must ALL unify if we are to survive as a species.

The purge

Educate the population as to why this is essential, and realise that the reason most foreign countries have numerous kids is that without an old age financial system, it is the kids who have the responsibility to look after the elderly when the time arrives.

We are reluctant to act due ti sentimental reasons. if we don't eventually act, then the forces of nature will be forced to do it for us, and it won't be a pleasant experience.

Were working on it. Malnutrition, Starvation, migration turned back, small wars, bad water, etc.

Hi so we had wars in the past. this might be a germ war next time as no one listens to the small voice about contraception.

WW III should do it.