Aristocracy dominated world culture well into the Medieval Era. However, during this era a new class began a slow rise to power which still exists in today’s capitalist societies.
At the start of the Medieval Era, the majority of a nation’s economic power lied with the elite aristocracy and/or royalty (especially evident in European countries such as England). There was virtually no middle class during this era, and the lower class was in large part ignorant to how much power they held. As the Medieval Era slowly faded, there began a shift in power from military to economic. As there became an increasing demand for tradesmen, lower class citizens stepped forward to fill the need for these more skilled jobs (as opposed to simple farming or infantry). Along with this change in identity for many lower class people, came a beautiful realization of importance and skill (which helped usher in the renaissance).
This shift is a subtle but important one in the world of art. Paintings slowly shifted from portraits of God or royalty to portraits of humble yet noble people. For instance, instead of seeing awe-inspiring pictures of Jesus shining from heaven, one might see a picture of humble Mary and Joseph with their donkey. There was less of a separation between God and man (and also the royalty and commoners) by the end of this era. What began as a simple economic shift led to a cultural revolution which still affects society and art today.