It is difficult to predict with certainty what will happen to the size of the global human population in the long run, as it depends on a wide range of factors, including advances in medical technology, economic and social development, and environmental conditions. However, some demographers have projected that the global human population will eventually stabilize or even decline over the course of this century. This is because as countries become more developed and societies become more urbanized, birth rates tend to decline, leading to slower population growth or even population decline. Additionally, improvements in healthcare and nutrition have led to longer life expectancy, further contributing to population aging and potentially slower population growth in the long run.