Destroy all privately held guns
Personally I think one of the best ways of providing a safer and more peaceful (maybe) world is to destroy all guns that are not used for primary food production or personal protection from dangerous animals. Governments should buy them off their citizens so they are compensated and just destroy them. Recreational users who go to shooting ranges can use guns owned by the range so they are keep out of society. Gun users who hunt wild animals can do something else like go fishing or play golf.