I think that most of the people who have been featured here shared the same propensity for being stupid because they all believed the same crap that got them dead.
Officially it's called the Dunning-Kruger effect and it appears to be widespread.
The following article (which I believe is supposed to be satire, but really isn't) outlines the 5 universal laws of human stupidity, all of which we have seen demonstrated by these utterly stupid people.
The stupid, in comparison, are paragons of consistency, acting at all times with unyielding idiocy.
How many people do you know who qualify? I know a couple. I'm surprised they've survived adulthood to honest. One of them being my former brother in law, a man so stupid I'm stunned to know he still breathes.
Does this lead us to consider that the notion stated in the 'Declaration of Independence" is false and hypocritical?
These are disingenuous noble-sounding words, perhaps designed to lay a misleading foundation. These words were written by White men, no doubt all xtians, who were slaveholders, slave traders, and squatting on lands recently being stolen from the indigenous. Premeditated plans to expand that land base by continuing their genocidal practices existed. Through the general consensus of what came to be known as Manifest Destiny did the dispossession of self, lands, and liberty of the indigenous become national policy and practice. These practices were stupid and beyond stupid inflicting harm and legitimizing "Crimes against humanity"
In those times and previously, debates took place that usually concluded that non-whites were not human, but subhuman and so they were treated as such by the colonists/Americans. As well, they were xtians who through their arrogance and bigotry, whose proclamations from atop their pedestal of holier than thou self-righteousness, put non-believers in lower social strata. Among xtians existed also interdenominational prejudices.
Again, addressing the topic of equality, it is simply not true. Individual Humans have aptitudes and talents that are unequal and not universal across humanity.