There's evidence that Neanderthals, 60,000 years ago, carried their elderly and those with serious physical injury, and perhaps it's because the life experience of survival of these people proved of value to the community.
هناك أدلة منذ 60،000 سنة على أن البشر البدائيون كانوا يحملون المسنين و الجرحى ولعل تجربة هؤلاء للبقاء قد أثبتت قيمتها للمجتمع