I believe the answer is: The creation of national parks
Due to the conservation regulation from Theodore Roosevelt, The united states government founded 230 million acres of public lands that are resided for the creation of national parks. This parks were created to protect various forms of plants, animals, and natural resources reserves.
Male drivers between the age of 16 and 20 , with a bal of 0.02 are Three times more likely to die in a single vehicle crash than a sober driver of the same age.
Eventhough the number isn't particularly high, this could numb some of the drivers' reflex
hope this helps
He discovered the "new world", he discovered that the world wasn't flat , he brought new diseases to the new world which killed many. (If you need more lmk)
