Robert Putman’s The Upswing (written with Shaylyn Romney Garrett) provides a powerful meta-analysis of American social, political, economic and cultural change throughout the twentieth century. What this analysis reveals is the existence of an almost perfect arc of social progress which begins from a low position around the Gilded Age at the beginning of the twentieth century and then climbs across all variables until reaching a highpoint around 1960. The Progressive Era, Putnam argues, engineered an ‘upswing’ against inequality, polarisation, social disarray and a culture of self-centredness. Since then, however, the data suggest that a severe downswing has occurred which explains the existence of deep divisions and polarised politics in t...