Do you ever stop to think about how odd it is to have a large prefrontal cortex and a limbic and reptilian brain stem all crammed together inside your skull?
Talk about opposites attract.
The two couldn't be more different.
In theory, this is a good thing. What is that saying about "keep your friends close and your enemies closer?"
The reptilian and limbic brain is all about survival - as in, I get that you're hungry but I'm not on the menu.
This is the part of the brain we need to deal with the pandemic threat from COVID-19.
In contrast, the prefrontal cortex is all about evolution - as in, survival is so last year. I want to thrive!
This is the part of the brain we need to deal with current racial tensions, gender tensions, age tensions, sexual orientation tensions, socioeconomic and cultural tensions, interspecies tensions.
So one part of our brain - arguably the most ancient part of all - is simply trying to get us from one minute to the next, one day to the next, still all in one piece.
To do this, it needs to notice everything, catalogue everything.
Every tiny difference, from size and shape to species or skin color - it notices. And it tells us about it. It tells us with the inherent bias that "this could be life-threatening - it probably is life-threatening - if you ignore it and it ends you, don't blame me."
Truthfully, this attitude - unpleasant though it sometimes may be - is probably why our species has made it this far. Over the millennia, the reptilian and limbic brain system has become very good at what it does.
Then there is this other part of our brain - the prefrontal cortex and its systems, which is arguably the newest part - that is working overtime to help us learn how to make the most of this extended survival our reptilian and limbic brain system is providing us with.
To do this, it needs to learn how to see similarities - first impartially and then preferentially - to differences.
It needs to overcome the tendency towards seeing life as us vs them, with prejudice, discrimination, and even outright fearfulness of surface differences - it needs to dig down and get detailed about which of these differences actually still matter (aka still help us survive another day) and which no longer matter at all.
In other words, it needs a system update. Or rather, a massive operating system overhaul.
As you like already know if you've ever caught yourself watching one of your devices verifying an update for hours and hours (never mind actually uploading and installing it) - this is actually quite hard work!
It can take a long, long, LONG time.