Definition av staten

Max Weber ger en definition av staten i ”Politics as a Vocation”:

‘Every state is founded on force,’ said Trotsky at Brest-Litovsk. That is indeed right. If no social institutions existed which knew the use of violence, then the concept of ‘state’ would be eliminated, and a condition would emerge that could be designated as ‘anarchy,’ in the specific sense of this word. Of course, force is certainly not the normal or the only means of the state–nobody says that–but force is a means specific to the state. Today the relation between the state and violence is an especially intimate one. In the past, the most varied institutions—beginning with the sib—have known the use of physical force as quite normal. Today, however, we have to say that a state is a human community that (successfully) claims the monopoly of the legitimate use of physical force within a given territory.

Min känsla är att denna definition, i termer av maktmonopol, är allmänt accepterad i samhällsvetenskaperna idag. Vilka är dess möjliga svagheter? (Jag tänker på maffian och Hell’s Angels.)