Recognizing and reacting to individuals based on group affiliation was probably an important skill for early hunter-gatherers, whose survival often depended on quickly identifying others as potential friends or foes. This categorization was made primarily on the basis of

Question

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Early hunter-gatherers likely relied on physical appearance to quickly categorize others as friends or foes, as this would have been the most immediately observable trait upon encountering strangers.

Recognizing and Reacting to Individuals Based on Group Affiliation Was