This paper develops a neo-Kaleckian endogenous growth model that incorporates aggregate supply - demand balance and balance between labor force and employment growth. The paper explicitly models income distribution which is a critical channel whereby unemployment affects investment and growth. The model generates a growth unemployment rate trade-off. A reduced propensity to save raises growth but it also raises the unemployment rate because of induced technological progress. This resonates with Alvin Hansen's hypothesis. The paper contains several theoretical innovations including a new mechanism whereby unemployment affects income distribution; introduction of a Phillips curve and inflation effects; and introduction of demand growth expectation effects.