The voice of truth.
However there is a catch on this one and every voice of truth.
When en mass people hear the voice of truth and become apathetic to it and choose the voice of lies and deceit, then that time is the time where you created your own merit.
The "own merit" as a mass, from that time there is no individuality in the merit, there is no "you create your own merit", simply because the choice was taken by all for all as all and as one.
Now, the above might sound a bit religious, or a bit anomalous but the fact is that once the merit of one is created by all, then there is no regret anymore for what lies ahead.
What lies ahead is simple, a corrupted World, full of twisted minds, zombies literally that parade in a path that will destroy everything upon Earth, even life as we know it, and thus there is only one way to save what can be saved.
You destroy it first, because you then isolate the problem, you place a quarantine and you isolate it only upon Earth and not letting it spread outside.
Now, this is important,
When the truth makes the mass apathetic and they crawl towards deceit and destruction, you then destroy everything first.