A firearm in every home like the Swiss model would be a good start.
Liberals would have to be excluded since they would probably hurt themselves anyway. Instead, they would have to take the locks off their front doors since they think some people deserve other people’s money. Nothing better than making people participate in their belief system.
During the 2008 election cycle I asked more than one lib with an Obama bumper sticker and a late model car to “share the wealth” and trade their car key for my key to my 12 year old beater. No takers, but the looks on their faces was priceless!