The 'darkness' as it currently exists is driven by hyper-nationalist non-democratic states (China and Russia) and failed states (Syria, Afghanistan, Libya, etc.). There is no plausible change that would address these problems.
Two response:
1 - No, the darkness is not our challenges but how our representatives act destructively to get elected rather than rally a public to deal with challenges
2 - Rogue states are on the downswing don't you know ?