I think a lot of the above has to do with a personal worldview, and that other personal worldviews could be considered equally valid or perhaps even more balanced. For example, people are social creatures by nature and therefore tend congregate into communities. This isn't some conspiracy theory programming. It's just the way things are, and in order to have a society of any type, there needs to be organization, and that requires some sort of hierarchy or nothing would ever get done, and that hierarchy is going to be organized largely by the abilities of those within the society. So when this first happened, did that automatically make the ones who were tending the crops and animals the slaves of those who decided where it was best to grow the crops and animals? I don't think so. I think slavery came out of the development of politics and law.
Today we might equate social imbalance to slavery, but it's not really the same thing. The complexities of modern society aren't nearly as simple as a master/slave situation. The worker at the bottom of the pyramid isn't owned by the executives at the top. Both have to work to maintain the pyramid or they'll get fired, and while the worker supports the executive, the executive is responsible for all the workers under his or her purview. So the responsibility goes both ways, and on an individual basis, it's the executive that has more to lose. All these intricacies are tied together to service the global system in a way that makes everyone responsible for maintaining some part of that system, and it's far too complex to think it's all controlled by a small cabal of black suited power brokers in some dimly lit room filled with antique furniture and the aroma of fine cigars.