Let's go to the realistic solution that all parties will accept, myself included, which is international peacekeeping force..

For such a solution to work and to be accepted it has to be impartial and so far the only authority that can endorse and implement it is the Security Council.. In its current form it's ineffective because 5 countries nominated I think in the 195os or so control it and you know how the veto can nail down any resolution..

How can it be democratized?

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You need Religion so when everyone goes to Paradise you're not left behind..