I'm not just referring to humans, we are certainly the most sadistic of creatures, far too often deliberately, often taking pleasure in others pain. I also think about the Animal Kingdom in which instinctive responses or need to sustain oneself requires hunting and eating other creatures.
I've heard some strong explanations such as "we need evil to know what good is" etc. However, the abundance of suffering, just the physiological system of nerves and sensors that elicit pain, it's always been difficult for me to understand why God created earths creatures this way.
In fairness, I don't even know why this makes sense from an evolutionary standpoint either when I think are probably better ways to have been built (even as the human body and brain is the most complex on earth).
The answer is plain enough for many. God gave
absolute freewill to man on the day of his creation. Now, the way in which I personally interpret this is God trusted man to do the "right" thing more often than not. In other words, God trusted man to have the personal responsibility to not eradicate himself right off the bat. That said, since time immemorial, one minority segment of mankind has been out to convince the rest of us how evil is a relative or subjective concept; an idea completely situational in nature. See, man is his own worst enemy in that regard because the accumulation of wealth and power over other human beings is an ugly affair, one requiring no small amount of constant justification to those you're setting out to oppress, and self-justification or reassurance that doing evil for one's own gain can be spun as somehow morally good or at least acceptable enough to allow for a good night's sleep.
Tabula rasa. The newborn human mind is the perfect medium for perception and learning and mortal creation, or destruction. No man is born inherently evil nor a moral paragon. We learn these behaviors up to a point. However, I have always believed a child will natively lean toward the good, right and just in the absence of conditioning toward that end, rather than develop organically a base human wickedness. However we look at this primordial issue, the truth remains, it is us up to each of us in the end to embrace personal responsibility and be valuable to our species and families; to put fourth the great personal effort to be good, honest, reasonable and merciful and compassionate
outside of imminent threats to our existence.
The greatest threat to human civilization overall I believe is moral relativism or the denial of the existence of indelible good and evil. Universal truths exist. Our American civilization is founded upon and depends on them to continue forward. Should our leaders lose themselves in subjective reality, moral relativism, factual relativism, moral nihilism, etc. civilization will end and chaos will reign. Unfortunately, in our Age and era of civilization, our civilization depends on tolerating a degree of hedonism in the ruling classes, as well as a degree of voluntary lack of desiring wealth. We give our leaders release to enrich themselves in exchange for their public service and adherence to our founding documents and the philosophies and ethos they embody. Speaking to America in particular, the good news is just about anyone can work their asses off to climb to wealth and success, a unique case in the whole of human history. Some men will always exploit the rest for power and great sums of money. Most would argue this is a necessary evil. However, the Marxist Religion seeks to trade one evil, the hedonist's domination of Western Society, for a bait and switch promise of rule by the working class, which always works out as Marxist party leaders becoming the new hedonist authoritarians.
What else can be said other than, "pick your poison and move on?"