It is all about power and those who wield it. I have just started the recent book God's Bankers, which is about not only the Vatican Bank, which is a fairly recent institution, but centuries of history of the Catholic Church and inherent corruption in ongoing power struggles within the clergy.
The feudal system in Europe was not unlike the organization of society in India of the time. The kings and queens and emperors were involved in constant power plays for territory, and the Church was a key player in all of that as well. The Borgia family when it had control of the papacy was very active in politics and wars. They had their own army.
Religious doctrine is essentially just a thin veneer over the underlying purpose in these regards. Scratch that surface just a little bit and follow the money trail, than the story begins to emerge.
One caste in power, others benefiting from that power. The power trickles down, just as the money does.
Currently in America, the middle class is being squeezed, and that has been going on for over twenty years. In India, on the other hand, the middle class is emerging and expanding with various professions, information technology being one example.
As far as the current geo-political reality today, the global trend is self-evident. Yes, the ongoing conflict between Sunnis and Shiites in the middle east remains a talking point on Capitol Hill and in the media. On the other hand, the real power brokering behind the scenes, behind closed doors, remains the same as it has always been, with one distinct difference: The reality of the world marketplace being homogenized. The last three companies I worked for were 1 Canadian and 2 Indian companies with major operations in the USA. Today I work for a small company owned by an Armenian-American and the other members of the team are a Colombian immigrant, a Mongolian immigrant, a Chinese immigrant, a Gujarati immigrant, a Bulgarian legal resident and a Jewish American. I was born in the USA with European ancestry. The demographics of the team are like a committee in the United Nations.
So, national boundaries and cultural differences are gradually dissolving as we head for 1 world culture and one economy. Human society tends to be organized hierarchically, that is just a plain fact. I see no reason for that to change anytime soon.