So NS, what do you think happens when you die?
I think that when we die we are reincarnated into the next sentient thing born- whether human or otherwise- in the universe. The time between death and rebirth feels instantaneous. Also upon your souls reentry into a new body, the old memory is wiped.
This process doesn't adhere to morality, thus you won't necessarily be reborn as a beggar if you were evil in your last life. Instead the process is likely totally random and divided into stages.
Although memory doesn't transcend this process, it's quite likely that all bodies inhabited by the same soul have certain mental and psychological characteristics, such as an interest in politics or inherent boldness.
1-Death. Final cessation of consciousness within the old body.
2-Memory Wipe
3-Your soul is sent to a cosmic waiting area.
4-Souls enter a newly born sentient being in order based on who died first.
5-Consciousness within the new body.
6-After 0-120 years: Repeat.
Thus, it is my postulation that everyone here has likely lived multiple lives but doesn't remember any of them. It is perfectly possible that one of us may have the reincarnated soul of such individuals such as Hitler or Lincoln.
