I've also heard that was an average, when at the time infant mortality was around 50%. https://ourworldindata.org/child-mortality-in-the-past https://ourworldin

I've also heard that was an average, when at the time infant mortality was around 50%. https://ourworldindata.org/child-mortality-in-the-past https://ourworldindata.org/child-mortality-in-the-past