These positions can either be stable, as in the classical equilibrium hypothesis supported by Adam Smith and David Ricardo; unstable, due to technological progress (examples include Karl Marx and the LTRPF
, and Joseph Schumpeter and the hypothesis of technological revolutions [Schumpeter 1942]); or due to a lack of aggregate demand (Keynes 1936), which in the Cambridge school variety (Kalecky 1937; Kaldor 1940; Robinson 1956) is reinterpreted, in terms of income distribution, as a recurring bias in favour of profit and to the detriment of wages.
To the literature supporting these fundamental propositions Adrian Sotelo Valencia's book adds a number of very distinct theoretical hypotheses as well as several well-aimed polemics against recent critiques of Marx's theory of labour value, the major postulates of which constitute the foundation of the LTRPF
. A prominent Mexican sociologist, Sotelo brings to the analysis of what he calls the "structural crisis" of global capitalism a perspective heavily informed by the "advanced dependency theory" of the Brazilian Marxist Ruy Mauro Marini.