"Progress" cannot be defined by ideological positions staked out as much as hundreds of years ago. It requires an advance in our basic understanding of justice.

I have learned that the ethic of justice is mutual respect (of a basic kind: taking one another into account). That might not sound very robust, but it is. A society governed by mutual respect would have the maximum liberty that co-existing people can share simultaneously and a democratic political process.

Applied to the economy, mutual respect establishes three conditions of justice: freedom to choose how/to what extent to participate in the economy; the presence of a "democratically distributed income (DDI);" and the absence of exploitation (which can be accomplished with an expanded DDI). The more of those conditions that are met, the more just an economy will be.