The tragedy of our animosity is that we deny it. Despite clearly being classified as animals, under the kingdom Animalia, we humans want to believe we are above those primal instincts that define our very life cycle and social structure. We want to believe ourselves above other species, just for the sole cause that we have partial “control” over those instincts. Developing traits like sentience, emotions, and curiosity has made us something different from an animal, but it is hard to decide whether that is something greater, superior or far worse.
Animals have a system - a set of rules that fits them in the environment. A food chain, a breeding cycle, a lack of emotion, and a constant threat to life. Animals do feel simple emotions like affection, lust, anger, fear, and sadness, but they do not have more complex emotions like vengeance and remorse. If a member in the family dies, the animal mourns for a day, and then moves on with its life - so is the way of nature: death is certain and acceptable. Humans, on the other hand, have developed too complex a reaction system to stress and sadness. Loss can cause trauma so deep to the human mind that the brightest and able individuals can lose hope in life.
The most advancing field in research and the second largest industry in the world (only succeeded by the arms industry) is medicine. It may sound harsh, but medicine is the prime and obvious cause for all the problems being faced in the world. This is because medicine fights against nature for one of its ultimate ritual: Death. Death controls the population and overpopulation is the cause for ninety percent of the problems we face globally. As much as we would mentally deny it, medicine delays elimination of individuals from our species which would promote the overall cellular and physical improvement through natural selection. If there is a disease that is killing people, the one who develops immunity to that disease will prosper and multiply, and so his offspring would be an improvement to the species. The aged, dying sooner would save them a lifetime of being less productive, suffering to quite an extent, and being liabilities. They would also make way for younger individuals to enter the system.
When Homo sapiens first appeared on the Earth, there were about five species similar to them. Within the span of a few decades, all those species vanished. This was attributed to two things that the homo sapiens did different - the community mentality (no alpha, just groups of males and females) instead of the herd mentality (one alpha male who has right over all the females, while the lesser males must compete for position of alpha, or get removed from the herd on adulthood), and no breeding seasons (an important point that we now take for granted). This allowed Homo sapiens to quickly multiply and outnumber their rival species, and then swiftly eliminate them. After that, we Homo sapiens entered a long period of prosperity and practical domination over most species.
I know what you are thinking. This is mean, this is wrong, this is cruel and merciless.
But nature is just, not cruel. Its systems and rules are the ones that allowed us to come into existence, and now like bitter spoilt children, we choose to spit in the face of nature’s ways, and instead try our best to preserve our now comparatively primitive species. I say primitive, because by removing ourselves from the food chain, from nature, and from natural selection, we have automatically halted our biological evolution. While we hate to imagine our species being removed from nature, in our conservative stubbornness we have disabled nature of making us a better and a more evolved species.