People always all their life think that everything will be fine, till the end, and maybe after that (death) there is a new life..Nobody knows, we just hope that there is a reincarnation process after death
Life after death as told by all god prophets is a new life that every single person will either enjoy or suffer
and if we considered Reincarnation there will be multiplepersons !! as a one entity with different lifes..
Say (O Muhammad SAW): "(Yes) verily, those of old, and those of later times.
"All will surely be gathered together for appointed Meeting of a known Day. (Al-Waqi'ah 56:49-50)
O man! Verily, you are returning towards your Lord with your deeds and actions (good or bad), a sure returning, so you will meet (i.e. the results of your deeds which you did). (Al-Inshiqaq 84:6)
So only cultures that rejects life after death accepts Reincarnation.