Anarchism does not prevent tribes, warlords, organizations, or armies - it is the absence of such constructs.

If anyone is truly interested in applied anarchism, look to Somalia [0] and try to make a difference there. It's not all bad [1] [2], but I think there are many vastly superior alternatives.

[0] https://en.wikipedia.org/wiki/History_of_Somalia_(1991%E2%80...

[1] https://www.independent.org/pdf/working_papers/64_somalia.pd...

[2] https://www.independent.org/publications/article.asp?id=1861