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# How many humans were born since beginning of humanity?

Market sizing
Recent activity on May 04, 2016
5.6 k Views

How would you solve this one?

• Date ascending
• Date descending

One proposed approach

1. Define when the humanity began, how long ago.

2. Divide the period between when the humanity began until today in more periods based on the total population, assuming each period had a constant total population. (here you should mainly pay attention to what happened after the middle ages, before that it doesn't really mater for the final result because the world total population was much much smaller than until the middle ages)

3. For each period determine the average life expectancy.

4. Having the average life expectancy use the replacement principle to get how many people were born within that period.

5. Sum up results from every period.

Any comment or another method is welcomed. ​

Stefan