Humans for the most part have no ethics.

Humanism definitely would never be "universal ethics" considering that humanism is itself devoid of any ethics.

Since man is evil naturally, universal ethics could only arise out of a government system where a few ethical rulers impose their ethics upon the evil population at large.

In other words, the current idea that "democracy is the best" is a fallacy that unless rejected will forever keep almost all ethics out of mankind's existence.