This is the conclusion Ive come to after all this time.
I believe this suicidal tendency is cyclic and always precedes catastrophe. Our souls are eternal and I believe they know about the coming end. People just give up before the 'event' that will kill nearly all life on the planet.
Some people respond to this psychic knowledge by becoming evil, violent, murderous. They get into power and then use that power to harm others because they know the end is near.
Combine that psychopathic, psychic behavior with the theory that as the Earth's magnetic field weakens, living things become more violent (See Chan Thomas's book The Story of Adam and Eve). The magnetic field is weakening because the cataclysm is coming.
Some people respond to this feeling of impending doom by just giving up. They tune out from external stimuli that would warn them there is danger and to be cautious. Look at the people that lined up for suicide by injection! What happened to their senses?? They gave up. They know, on a deep level, they are doomed so they quit trying to survive and just took the shot despite all the warning signs.
The cyclic nature of near extinction level events is known. If we know it here, now, in this estate or dimension, then we also know it in other planes or estates. I think we are getting psychic messages/warnings/feelings to be prepared.
Not only that, we have warnings from our ancestors about these things and the need to be prepared. The bible and other ancient texts talk about "end times" and world wide destruction. Those are warnings from our past.
So, some get violent and psychotic. Some get hopeless, quit and commit suicide (this is the majority of humanity IMO) and that leaves a small group, a very small group, that sees what is happening, understands it, accepts it and is trying to be as prepared as possible for it.
The point is, as a species, we know its about to end and we cannot stop it. We get messages from the past and the future about it. Some heed it. Some dont.
Id like to hear your thoughts.