Also, it's not useful to refer to "government" as the thing being opposed by anarchism. What they are really opposing is hierarchical organization in general.

I used to be more sympathetic to that point of view, but I eventually realized that too many nifty things (such as the computer I'm typing on) could not possibly have come into existence without a disciplined, well-managed hierarchy of some sort. Somebody has to be the boss, or we might as well all go climb back into the trees.