Population ecologist William Rees of the University of British Columbia’s School of Community and Regional Planning reminds Earth’s inhabitants that the planet can only support a certain number of people. In an article published in the journal WorldHe notes that over the years, many models have been developed that show that only a certain number of animals (such as mice) can survive in a particular environment, all of which at some point show that an adjustment has occurred in the population.

In 1947 ethologist John B. Calhoun conducted several experiments with mice in density experiments in open chambers; he gave every colony everything it needed to survive, except for the extra space; There were no predators. Mice multiplied flawlessly until they could no longer survive in the confined space given to them; population adjustments were made; in some cases none of the mice survived.

Subsequent experiments with other animals showed much the same thing, leading many experts to conclude that humans would soon find themselves in the same situation. This is what Reese points out in his article.

Rees notes that there are already signs of overpopulation stress; The planet is warming and critical resources such as food and water are threatened, as well as the availability of fossil fuels. He also notes that many Earth cycles are disrupted, such as weather patterns and the global nutrient cycle.

Taken all together, it suggests that planet Earth is perhaps heading towards a major population correction towards the end of this century. He states that such a correction would lead to a sharp reduction in the human population. He adds that such reductions can occur in one or more ways, such as war, famine, habitat instability, or disease. In Calhoun’s rat studies, many rodents withdrew from society, refusing to work or even attempt breeding.

Rees concludes that such a fix has not been resolved, despite the results of the experiments. He points out that because our brains are larger than mice, it’s possible for us to realize that our behavior is stupid and make changes that can save us.

He suggests that if we significantly slow population growth, stop global warming, and solve other problems we have created, the human race may survive until another event beyond our control kills us. According to him, the first step is awareness of problems. After that, planning and innovation can lead to realistic solutions. Source