Imagining the devil we know...
Is it a wrong approach, as claimed recently, to start with your favourite quality or value (freedom, equality, justice etc), and then try to imagine what a society would look like if it were arranged to maximise that quality?
Should we, instead, examine the political and cultural institutions we already have and work from there, as failure to do this might lead to incoherence and fantasy?
Not sure...just because most "-isms" are divisive and fail ultimately, should we really give up on all big ideas and hopes of breakthrough change in favour of sheer pragmatism?