The Clan of the Cave Bear (1986)

At The Dawn Of Mankind, A Woman Led The Way.

Natural changes have the clans moving. Iza, medicine woman of the "Clan of the Cave Bear" finds little Ayla from the "others"' clan - tradition would have the clan kill Ayla immediately, but Iza insists on keeping her. When the little one finds a most needed new cave, she's allowed to stay - and thrive.