Answers (1)
They have nothing in common just similarities, each culture develops and imposes their own set of ethical and moral code some of which may overlap with our own culture, to quote Ruth Bennedict:
"We might suppose that in the matter of taking life all peoples would agree on condemnation. On the contrary, in the matter of homicide, it may be held that one kills by custom his two children, or that a husband has a right of life and death over his wife or that it is the duty of the child to kill his parents before they are old. It may be the case that those are killed who steal fowl, or who cut their upper teeth first, or who are born on Wednesday. Among some peoples, a person suffers torment at having caused an accidental death, among others, it is a matter of no consequence. Suicide may also be a light matter, the recourse of anyone who has suffered some slight rebuff, an act that constantly occurs in a tribe. It may be the highest and noblest act a wise man can perform. The very tale of it, on the other hand, may be a matter for incredulous mirth, and the act itself, impossible to conceive as human possibility. Or it may be a crime punishable by law, or regarded as a sin against the gods."