I walk like I drive

I was musing on how we walk on sidewalks today. Not that this is a particularly new observation, but I find it interesting how we tend to walk on the right side of sidewalks. When trying to pass by slower moving people, we tend to walk by on their left, and then merge back onto the right side of the street. Furthermore, when we are passing oncoming pedestrians, we tend to pass each other on the left side.
In addition to this, when on escalators, standing people stay on the right, whereas walkers move on the left side of escalators.
This is particularly striking when you go to countries where they drive on the left side of the road; there, pedestrians walk in the exact opposite manner that I just described, and when you're walking by them, they get very confused when you try to walk by them on their left side.
This makes me wonder as to how we conditioned ourselves to walk like CARS! Humanity has walked on its own two feet for millennia, yet our conventions as to how to do so over the past century have been defined by machines. I find that disturbing, that we have modified our natural habits to be in harmony with the machinations of industry. I mean, not that we haven't sacrificed much already, but for something as natural and mindless as walking, it is odd how we have narrowed the expression of how we ambulate.
Perhaps, then, that Monty Python's famous "Silly Walk" sketch is not so much comedy as it is manifesto. A call to take back our own feet and to move in ways that please us, not in ways that simply conform to the miles of highways that our cars sit upon.