"What exactly is this "solidarity economy approach"? For some theorists of the movement, it begins with a redefinition of economic space itself. The dominant neoclassical story paints the economy as a singular space in which market actors (firms or individuals) seek to maximize their gain in a context of scarce resources. These actors play out their profit-seeking dramas on a stage wholly defined by the dynamics of the market and the state. Countering this narrow approach, solidarity economics embraces a plural and cultural view of the economy as a complex space of social relationship in which individuals, communities, and organizations generate livelihoods through many different means and with many different motivations and aspirations—not just the maximization of individual gain. The economic activity validated by neoclassical economists represents, in this view, only a tiny fraction of human efforts to meet needs and fulfill desires."
Ethan Miller's 2006 article in Dollars and Sense