The human race has experienced a consistent increase in population since the beginning of
its history. Famine and disease have done little to offset this steady increase. Too many
people are added annually to the population of the world. So both the causes of population
increase and the results of having more people are worth careful study. Culture evolution
is the major factor responsible for population increase. Early in human development, people
invented tools to hunt animals. Later they built shelters to protect themselves. Step by
step, they made life easier. As a result, fewer died from natural forces, such as harsh
climate and disease. In the past, when population grew, there was unexplored territory to
inhabit. But now, almost all the habitable land has been explored. The world's population
may reach 8.7 billion in 2033. It is clear that world population is a serious issue that
needs careful attention. Human beings are unique to solve problems through cultural evolution.
Facing the world population explosion in the near future. We must carry out the birth control
program in order to save the mankind and save the world.