Answer:
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The
would enable a woman to assess a man's level of commitment, detect the existence of prior commitments to other women or children, and simultaneously signal to the man her sexual fidelity.

It is the scientific study of human society and social relationships. It's also the subject within the field of social science, such as economics or politics. Hope this helps you!
Explanation:
Because a modern society is one with rapid and easy communication and travel. In a world with rapid and easy travel and powerful weapons technology the result of inequality, injustice and exclusion will be genocidal war and extinction. This can occur on the global scale or the national/regional scale. There are no options.