I already answered your question, by dismantling the government provided mechanisms by which wealth and power accumulate. I'm not an anarchist, not even a minarchist. I'm not even opposed to some manner of minimal intellectual property rights. The point of bringing up the concept of zero intellectual property rights is so that you can see the primary mechanism people accumulate wealth and power in the modern age is through government created mechanisms such as patents and copyright. Since I'm not an anarchist, hopefully you can see how it's trivial to protect from things like warlords.