Darwin convincingly showed that all species including the human species evolve by cultivating traits that advance survival and domination for their own sake without moral content. Thus, as Thucydides wrote, the eternal narrative of the human species is the strong do what they can and the weak suffer what they must. Hormonal gratifications are triumphant. The armored knight is exalted, and the thinker is persecuted. An insatiable lust for power, money, sex, celebrity, creature comforts, and narcissistic falsehoods have informed the human narrative from the beginning of time. It is in the DNA and cannot be changed. The example of Jesus is honored in the breach not the observance.
The species will never acknowledge or confront the depths of its depravity and sordidness because the acknowledgement would weaken the innate craving of survival for its own sake no matter how dastardly or vile.
In sum, the human species has forfeited its right to exist by any moral or ethical yardstick. Reform is an illusion. Don Quixote recognized the same once his adventures had concluded. The soaring Sermon on the Mount was delivered on the most blood-stained territory on the planet.
All of this leads to one grand purpose in life. To attempt to diminish injustice or evil and to advance benevolence and wisdom knowing in advance you will fail like attempting to turn straw into gold. It is done because it is the right thing to do, and the world will be better off for it—even if the results are invisible and inaudible.