Whole idea of progress - that presence is based on the past, that future generations are going to improve our achievements, and that man will be always moving forward - obviously negate the idea of some absolute measure. Everything became relative, just like in Hume's subjectivism. Man's current criterion was left for future generations to improve it. After a while, people realized that this is philosophy of continuous change, continuous moving. Then, a soul became upset. It felt there is no peace, there is no safety.
