Wrong again! "Natural rights" are a European Enlightenment concept, just a few centuries old.. And the first stone tools dated to 2.6 million years ago were hammerstones, stone cores, and sharp stone flakes, all used to process animals for consumption: https://humanorigins.si.edu/evidence/behavior/stone-tools#:~:text=The%20Early%20Stone%20Age%20began,and%20other%20large%20cutting%20tools.