The population of the world in 1914 was ~1.8 billion people, give or take a few million. An estimated 70% lived in "extreme poverty" (Karolinska Institute), which refers to a condition of no reliable shelter or food. Mud huts, grass roofs and subsistence farming. Sharing a toothbrush between seven other family members.
By 1970, half the world population still lived in extreme poverty. This was supposedly the beginning of the period of "super-decadence".
Now, let's jump forward to the present. World population: ~7.3 billion. The percentage of Earth's population living in extreme poverty: estimated at 12%.
So, in 1914 about 1.26 billion people lived in extreme poverty. In 2014: 876 million. Not only has the total amount of people living in extreme poverty gone down ~30% during the "decadent" period, in the last hundred years capitalism has somehow managed to add a staggering ~6.42 billion people to the global population without hurling them into extreme poverty.
That sounds pretty fucking progressive to me. How do you defend the theory of decadence despite data like this?