In which year did the global population reach 1 billion?

The global population reached 1 billion in the year 1804. This milestone marked a significant point in human history, as it reflected various factors such as advancements in agriculture, improvements in public health, and the overall increase in the birth rate that contributed to rapid population growth. The late 18th and early 19th centuries were characterized by such developments following the Agricultural Revolution, which allowed for more efficient food production and, consequently, supported larger populations.

As a historical reference, prior to reaching this landmark, population figures were much lower, and significant growth was not observed until the early stages of the Industrial Revolution began to take effect. The other choices reflect years that are either before this milestone or do not align with the data recorded about global demographics at that time. This context is essential for understanding the growth patterns of the global population and its implications for society.