Abstract

Tribalism is one of humanity's oldest instincts, rooted in the survival needs of small groups and still shaping modern life. This paper explores the evolutionary and neuroscientific bases of tribalism, showing how brain systems promoted ingroup loyalty while diminishing empathy toward outsiders. It examines how cognitive biases, political identity, and online echo chambers amplify tribal divisions and distort reasoning. The paper concludes by emphasizing that while belonging is essential, overcoming tribalism requires questioning group narratives, engaging across divides, and recognizing shared humanity.