The main initiative that the US took in the 1920s to help ensure economic stability and peace in Europe was to bring into effect the "League of Nations," although the US ultimately ended up not joining this group.
There is no quote i could find by Thomas Hobbes that starts out like that but this one is similar " Government is necessary, not because man i naturally bad ... but because man is by nature is more individualistic than social."
Sorry i couldnt find anything