The common interest of nearly all development and growth theories is the fundamental concept of the ‘harsh’ intertemporal consumption trade-off: Current consumption inevitably reduces future consumption possibilities in a with-or-without sense. This is true for the early ‘low-level-equilibrium-trap theories’ (Nelson, 1956 and Leibenstein, 1957), the neoclassical growth theory (Solow, 1956; Swan, 1956; Ramsey, 1928; Cass, 1965; and Koopmans, 1965) as well as the for endogenous growth theories (e.g. Lucas, 1988; Romer, 1990; and Rebelo, 1991).