It seems like such a big deal when an idea, a new ruler of a country, or even a great civilization rises up, but in truth they're all phases, just eras. Over such great periods of time that this universe holds, these huge ideas and concepts that we let become so present in our lives are merely small blips when it comes to the incredible span of human existence. They blaze bright and hot in their prime, spreading to consume more and more until it seems that they're raging out of all control, but...
In time, these leaders, whether they are tyrants, presidents, social icons, or manufacturers will lose their glory. They burn out and float from their high standing to the ground, forgotten, just one of millions of ashen flakes which are all indistinguishable from one another. The fire itself may leave its scars, but the ash will always follow, no matter how great the flames may be or how wide they may spread.
Sadly, among the great pile of ashen leaders and concepts are some great people and great ideas that healed many in their time--a warming fire, rather than a destructive one. But those leaders fall all the same, and they leave no hurts to be remembered by.
In essence, all leaders fall like ash at the end of their eras. It is up to those who were touched by the flames to remember whether the fires they came from were flames of healing and compassion or flames of suffering. Don't just remember the scars that were once wounds, but also the warmth that once filled you and stirred your heart for as long as you could feel its glow.
And remember too that those leaders who have brought great harm, and who are still bringing great harm today, will lie as insignificantly as the rest, equally as cold and grey as those who have fallen before them.