Many such historians tend to lump you and I into a collective, responsible for all the ills of the world because we have been immoral and undisciplined, when really there are now and have always been, only a few who have had the privilege and ability to exploit the entire earth and all it’s peoples so completely.
When these small groups organize and gather power in such a way as to completely rape, abuse, alienate, disenfranchise and disaffect the masses, all accountability is lost.

Many important battles have been won and lost, it’s just a focused and determined evil of a few that ruins all.

“A little leaven leaveneth the whole lump” (Galatians 5:9)

A yeast infection. The masses are dumbed down and rendered ineffectual. Collective guilt only goes so far, especially if you believe most people are good.