If one ever had the chance to witness the prosperity and brilliance of society, to see all that is flourishing and bright, who wouldn't be heartbroken by this?

It is nothing but a dog-eat-dog world.

When self-interest becomes the sole criterion, when social status becomes the benchmark of judgment, when communities and society turn into ruthless machines; when the law of the jungle becomes an accepted truth, when the extravagantly luxurious powerful prey on the lower classes for nutrients without restraint; when everyone has no choice but to become a screw, competing with ten or a hundred other screws for a position that seems more prominent and bright...

Humans prey on others, and are preyed upon by others.

To be stronger, to be higher, to escape the wide-open mouths of others, one must swallow other food into their belly first. Even if one struggles to the very top of the food chain, they only become one of the plump beasts, and their gaze toward other equal existences will only become increasingly thirsty and insatiable. Once accustomed to the pleasure of eating flesh and drinking blood, there is no going back...

This is the rule of survival in the age of beasts.