Human actions certainly play a role in the expansion though. But that aside: Is it "Nature can't be changed, so it's not worth trying"? "Nature knows best, bet

Human actions certainly play a role in the expansion though. But that aside: Is it "Nature can't be changed, so it's not worth trying"? "Nature knows best, better not interfere"? Neither attitude is something I associate with the US, so I'm not sure what the status has to do with them trying or not trying.