Overpopulation is Earth's biggest problem that needs to be solved. At an astonishing rate, the earth's population has grown exponentially and in more than a hundred years it will reach 12 billion people. Regarding population growth, many factors must be considered, such as cultural influences and illiteracy. Solutions may be available, but you feel the solution you choose is best for you based on your preferences. As a result, we are now left with both a question and a choice: “What do you think is the best solution to combat overpopulation, and will you stick to moral teachings or follow what the experts would say?” Overpopulation remains the largest and most difficult problem that needs to be solved due to the future consequences it could produce, such as the lack of resources to feed the population. The current population increase can be traced back from the Stone Age to the era of industrialization (Penfound, 1968). The population before Jesus Christ took 40,000 years to double at a growth rate of 2%. In 1850, the human population numbered one billion, rising to two billion just eighty years later, in 1930. Three decades later, in 1960, it reached three billion, and by 1975 it reached four billion people (Howard , 1969). Paul R. Ehrlich, author of the book "The Population Bomb," stated in 1992 that the earth will face "the need to support at least double the current human population regardless of the uncertainty of the sustainability of life support systems of the earth" (Daily and Ehrlich, 1992). He also predicted that in 2025, the Earth's population will be 8.5 billion, eventually stabilizing at 11.6 billion in 2150, based on “positive assumptions of continua… middle of paper…,” G. (November 1961). Birth Control in Great Britain Part II. Population Studies, 15 (2), 121-160. Retrieved from http://www.jstor.org/stable/2173312. Penfound, W.T. (May 1968). The problems of overpopulation. Bio,39(2), 56-62. Retrieved from http://www.jstor.org/stable/4606831 .Ryder, R. E. J. (1993). "Natural Family Planning": Effective Birth Control Supported by the Catholic Church. British Medical Journal 307, 723-6. Retrieved from: http://www.jstor.org/stable/29721085.Schultz, TP. An Economic Model of Family Planning and Fertility. Journal of Political Economy, 77 (2), 153-180 Retrieved from http://www.jstor.org/stable/1829763 .VandeVusse, L., Hanson, L., Fehring, F., Newman, A and Fox, J. (2004). Couples' views on the effects of natural family planning on marital dynamics Journal of Nursing Scholarship 35 (2), 1-13.doi: 10.1111/j. .1547-5069.2003.00171.