Forget about "good as gold". Today it's going to get evil. So, it´s a force from outside, that prevents us humans from developing freely. For Kant, evil is an essential part of human nature, since humans are not only equipped with reason, but also with "empirical", entirely worldly needs. The inclination to the "dark side"- so it has always been in us? His fellow Enlightenment thinker Rousseau sees things differently. For him, humans are born good. Only living in the community (is what) poisons us, makes us evil. Are we born evil, or does society make us evil? Nietzsche threw all of this overboard, declared "good" to be "bad" and "evil" simply to be a construct of Christian "slave morality.”