This essay sheds light on what is population growth, demystifies what causes the occurrence of population growth in a population, and delineates the benefits of the occurrence of population growth in a population. Succinctly stated, population growth is a term that delineates an amplification in the size of a population. An amplification in the size of a population transpires when the new members of a population are born at a higher rate than the rate at which the members of a population pass away at. The natality-to-mortality ratio refers to a ratio that states the birth rate of a population to the death rate of a population amid a specific time period. A high natality-to-mortality ratio denotes that a population has more of its members being born than passing away, whereas a low natality-to-mortality ratio denotes that a population has more of its members passing away than being born. Furthermore, a high natality-to-mortality ratio also denotes that a population is increasing, whereas a low natality-to-mortality ratio denotes that a population is decreasing. The rate at which a population amplifies at is predicated upon the rate at which the new members of a population are born at and the rate at which the members of a population pass away at. It is desirable for a population to have a natality rate that is high enough to surpass its mortality rate. A significant amplification in the quantity of the members of a population being born can have bearing on helping a population to attain a high natality-to-mortality ratio. Furthermore, a significant amplification in the average life expectancy of the members of a population can also have bearing on helping a population to attain a high natality-to-mortality ratio. A significant decrease in the mortality rate of a population coupled with a significant increase in the natality rate of a population is conducive to helping to facilitate population growth in a population. A significant decrease in the mortality rate of a population transpires when there is a significant amplification in the average life expectancy of the members of a population. A significant increase in the natality rate of a population transpires when more married couples in a population opt to churn out an increased quantity of offspring. The occurrence of population growth in a population can transpire with relative ease if the married couples in a population opt to an increased quantity of offspring. As of 2023, even though married couples are often eager to churn out an increased quantity of offspring, married couples on average limit themselves to churning out two offspring in lieu of churning out three or more offspring to further amplify their posterity. "The total fertility rate was 2.3 children per woman in 2023. This is much lower than in the past; in the 1950s, it was more than twice as high: 4.9". It is undesirable for a population to have a low natality-to-mortality ratio. Moreover, it is also undesirable for a population to have a medium natality-to-mortality ratio. As of March of 2025, it is estimated that a population needs to attain a natality-to-mortality ratio of at least 2.1:1 to maintain its population size. This is not only because it takes two people, a husband and a wife, to procreate offspring, but also because certain members of a population can pass away before reaching the age threshold for the average life expectancy of the population that they were born in. When certain members of a population pass away before reaching the age threshold for the average life expectancy of the population that they were born in, then it can have bearing on decreasing the average life expectancy of the population that they were born in. As of March of 2025, it is estimated that a population needs to attain a natality-to-mortality ratio of over 2.1:1 to amplify its population size. Population growth in a population is inapt to transpire if the members of a population as an aggregate falter in their endeavor to attain a natality-to-mortality ratio of over 2.1:1 in their population. The members of a population as an aggregate can falter in their endeavor to attain a natality-to-mortality ratio of over 2.1:1 in their population in contexts in which their population has a high mortality rate. Furthermore, the members of a population as an aggregate can also falter in their endeavor to attain a natality-to-mortality ratio of over 2.1:1 in their population in contexts in which the average married couple in their population opts to churn out two offspring in lieu of opting to churning out three or more offspring to further amplify their posterity.