Ah. Cool. I like being right.
So, couple questions then:
1. What would have kept the Brits from taking us back over and putting us under Crown Rule again in very short order? The militia, in 1776 and again in 1812, certainly had its uses. They were capable of inflicting heavy casualties on the Brits when they had a good firing position with cover. The problem is they were totally unable to stand up to Brit Regular Army units in open-field battle, until the Continental Army trained up line-units and artillery that could stand against them. This probably would not have happened without a central government of some kind, for a variety of reasons. So, absent any central government... or any government at all.... why would we not have been re-conquered by the British Empire?
2. What would have kept us from being conquered and enslaved by some other European colonial power c. 1776-1880?
3. What would have happened in WW2? Without America the Nazi's may well have won...or at least divided the world between the 3rd Reich and the Soviet Union.
4. How do we deal with crime? I'm perfectly capable of defending myself, but what about the elderly and the sick?
If John steals my lawnmower, and I go confront him, and he pulls a gun, and I shoot him dead.... and then his kinfolk want to kill me for killing their family member.... what stops a multi-generation blood-feud?
I'll stop there for now.