Around 100 years ago, in the year 1923, it was believed that there were roughly 1.8 billion people on the planet. In comparison to previous centuries, this was a huge gain since better living circumstances, sanitization improvements, and medical developments all increased life expectancy and decreased death rates. It is crucial to remember that population growth was considerably slower than in more recent decades. The social and economic structures of many areas were changing as the world continued to industrialize. This time period represented the transition to the modern era and paved the way for future societal advancement and population expansion.