Salam all,
I agree with ths that Mohammed Jean Veneuse is worth checking out. Very coincidental that I saw this tonight because I was thinking of posting his link here and asking what people thought.
No the Quran does not posit a specific form of government, however it does not specifically discourage governmental models of ant particular type either. Having said that, I just want to give an opinion What is usually referred to as "Anarcho capitalism" or market Anarchism does not appeal to me as an ideological platform for a Muslim conception of contemporary social organization. Like any other "form" of capitalism, radical marketocracy is a negative concept usually embraced by those who are opposed to the state at every level. Libertarianism seems to me to be inherently contrary to the spirit of the Noble Qur'an in that it negates the commonality of collective social responsibilities in favor of the cult of individual freedom which has overwhelmed contemporary "culture" in the West.
Ironically, we here in the United States use the term "libertarian" to describe this right wing orientation among capitalist-individualist-anarchists, while in Europe and elsewhere the term "Libertarian Socialism" roughly implies a form of anarchism whose central philosophical tenets would seem to revolve around more collectivistic models, greater emphasis on human solidarity, and general opposition to authoritarianism primarily as the term would apply to various forms of economic (readclass) exploitation, racial and sexual chauvinism, and classical economic liberalism as embodied in our contemporary consumer-capitalist model.
I would think that new social models inspired by these types of values would be more in accordance with the overall spirit of the message of the Qur'an than a dog eat dog war of all against all, in which Smith's "invisible hand" is free to strangle this planet in a deregulated orgy of bloodthirsty, profit-driven competition. We already have an international anarchist-capitalist system, dominated by the most profitable institutions over the interests of basic people, and the health of our environment. Capital couldn't be too much more "free" to do what it wants to internationally. and I would not even know where to start a list in which all of the ways in which that is contrary to Islam. Business and profit are fine in Islam, but an anarcho-capitalist system could hardly allow for many other aspects of Islam which are of equal importance, such as the collective responsibility of Muslims to the neediest among them (as embodied in the Qur'anic concept of zakat.
Just my ramblings here, thank you for a thought-provoking question, and peace to you.
La Illaha Illalahu.