Human Nature's Deadliest Instinct

Is "othering" our deadliest flaw, A whisper from a primal law?

Verse 1:

Is it written in our bones,

This fear of the unknown?

A shadow cast by ancient days,

Where love and hate collide in waves.

We draw the lines, we build the walls,

In every rise, there's a fall.

But what if we could see the light,

In every face, in every life?