The marriage practice of early humans and ancient civilizations that facilitated trade, reduced health problems, and prevented conflict was called

It was known as the exogamy. It is a social game plan where marriage is permitted just outside a social gathering. The social gatherings characterize the degree and degree of exogamy and the standards and implementation systems that guarantee its congruity. In social investigations, exogamy is seen as a blend of two related viewpoints: natural and social. Natural exogamy is a marriage of nonblood-related creatures, directed by types of interbreeding law.

Hi, the answer is "the national labor relations act"