The discussions about rebuilding the Syrian government by outsiders just... What gives anyone other than Syrians the right to even attempt to decide how things go in Syria?

Why is it so far-fetched to desire a world, if it is to be interconnected, that is so by peaceful commerce & discussion rather than by being constantly reconfigured by whoever has the most & best arms? What gives anyone the right to claim such authority AT ALL?

Does it all simply come down to "we can, so we will"?