The interesting thing is that countries are not people, they do not have interests. So whoose agenda is this sphere building exactly?

Well, the US is a corporate oligarchy, so there is that.

The US was never supposed to be a democracy. Anyone who thinks the US was "founded as a democracy" is a brainlet who can't conduct basic research or someone who was fooled by neoliberal academia and can't produce an original idea that wasn't unpacked and distorted for their soft mind by their kindergarten teacher.