We correctly expected future governments to occasionally want to get rid of undesirable ethic groups and created a definition that would leave them a few loopho

We correctly expected future governments to occasionally want to get rid of undesirable ethic groups and created a definition that would leave them a few loopholes as possible. If genocide was "kill more than half of a population" or "kill more than 100k people" it would be easy to erase minorities simply by forced sterilization. The Genocide convention was not created to stop people from dying it was created to stop entire populations from dying out.