I wish I could answer your questions. But I am Just returning to Spirituality after décades away. You may be missing other worlds.
The spiritualists claim that Earth is a atonement planet. We all are here to improve. The law of Universe is love, not hate. We still got a long way to Go...
But, Earth should change soon (to a regenaration place) by the end of this century. We will not live to see, but maybe we will be born again in this better Earth...
What people hier call Survival Instinct is a personal mentor or Guardian angel who take cares of you.
If you hate you attract and feed low spirits around you.
If you love and help, you get surrounded by higher spirits.
If you are mental sick, ask for help, for the higher dead and the living. And try to love more. It is always a great medicine.
You may disagree with me. It is totally Fine.
Peace and love for you!