Reincarnation became excepted more fully in the west just at the time where we could destroy our selves as a species

It is interesting that reincarnation became excepted more fully in the west just at the time where we could destroy our selves as a species making a return impossible in our human form. Would we have to start over in this world or another? One of the premises of reincarnation is based on not to radical of a change from one existence to the other, from One Life to the other. Could the anxiety And repulsion We experienced towards war be in part our species way of saving us from our destructive side?