Benjamin Franklin : Observations Concerning the Increase of Mankind, 1751 https://ia800900.us.archive.org/5/items/increasemankind00franrich/increasemankind00franrich.pdf G-Drive Backup: https://drive.google.com/file/d/1yTYdl8xY-6B3egYI0WezV2QpJ6uAEOin/view?usp=sharing
