Question

Before the 18th century, why was it difficult for the human population to experience growth?

Answer 1

I will not strech the answer, short and simple answer is below:

Human population grew rapidly during the Industrial Revolution, not because the birth rate increased, but because the death rate began to fall. This mortality revolution began in the 1700s in Europe and spread to North America by the mid-1800s. ... A slight increase in birth rates occurred after World Wars I and II.