Theoretical critiques of the tools of dominant economists by other economists

We will show that among well known neo-classics some of them have had the intellectual merit to recognize the limits of the famous pigouvian theory of externalities and recently even to propose new types of actions which are at odds with the ones of the dominant economists. But"dissident" economists belong for the most part to the so-called “ecological economics” movement, as opposed to « environmental economics » (the latter including notably most neoclassical economists who deal with natural capital).However this broad category of “ecologists »does not form a homogeneous block in the face of the theory of externalities. We can notably distinguish between ecological economists "ambiguous" critics and radical critics (133 words).