While most startups are focused on finding ever new "whats" and "for whos" (i.e. staking out as-yet unexploited niches), social innovation can involve rebuilding alternative versions of existing things from the ground up while rethinking their "ifs", "hows" and "whys" (eg. the fediverse).

So while "move fast and break things" may be the most "efficient" approach for capitalist projects to find what they call "product/market fit", what would be the most "effective" approach for those who put humans above profit?