I can provide information based on what was known up to that point.
Estimating the total number of humans who have ever lived is a challenging task, and there is no precise figure. Demographers and historians have made various estimations based on archaeological, anthropological, and historical data. The estimated range typically falls between 100 billion and 125 billion individuals.
It's important to note that any estimation of this nature involves a degree of uncertainty, and it is challenging to pinpoint an exact number due to the lack of comprehensive and accurate historical records, particularly for early human history. Additionally, factors such as life expectancy, birth rates, and population growth rates have varied significantly throughout human history, further complicating the estimation process.