The current debate on secular stagnation is suffering from some vagueness and several shortcomings. The same is true for the economic policy implications. Therefore, we provide an alternative view on stagnation tendencies based on Josef Steindl's contributions. In particular, Steindl (1952) can be viewed as a pioneering work in the area of stagnation in modern capitalism. We hold that this work is not prone to the problems detected in the current debate on secular stagnation: It does not rely on the dubious notion of an equilibrium real interest rate as the equilibrating force of saving and investment at full employment levels, in principle, with the adjustment process currently blocked by the unfeasibility of a very low or even negative equilibrium rate. It is based on the notion that modern capitalist economies are facing aggregate demand constraints, and that saving adjusts to investment through income growth and changes in capacity utilization in the long run. It allows for potential growth to become endogenous to actual demand-driven growth. And it seriously considers the role of institutions and power relationships for long-run growth-and for stagnation. JEL Classifications: B22, E11, E12, E65, O11 (1966), are completely ignored as well. 2 The same holds true for modern interpretations and applications of these approaches. This is a problem, because the theoretical foundations of modern secular stagnation debates are vague and can be challenged on several grounds. First, as is clear from the consensus proclaimed by Teulings and Baldwin (2014b) mentioned above, at the very foundations, even of the presumably more Keynesian work by Summers (2014aSummers ( , 2014bSummers ( , 2015, Krugman (2014), and others, in principle, we have an equilibrium real or natural rate of interest equalizing saving and investment in the capital market at full employment output levels, which, however, may not be feasible. This constellation is vulnerable to critique from the "Cambridge controversies in the theory of capital," questioning an interest rate-inverse and continuously downward sloping capital demand curve in a more-than-one-good