Whereas authors have frequently alluded to an adversarial politics amo
ng the new middle class of professional and managerial workers, survey
s and electoral returns confirm a generally conservative disposition i
n this group as a whole. In this paper I seek to specify a social loca
tion for left-liberal politics among a distinctive cadre of social and
cultural professionals, the cultural new class. This cadre also bears
a distinct geographical identity, with an overconcentration in the ce
ntral cities of large metropolitan areas, not least in their gentrifyi
ng districts. The part played since 1968 by the cultural new class in
these gentrifying districts in redefining the urban politics of Toront
o, Montreal, and Vancouver is examined. In particular, the role of a g
entrifying middle class in challenging a postwar hegemony of growth bo
osterism practised by the conservative regimes in all three cities, an
d their parallel attempt to sustain an alternative regime of reform po
litics, are assessed.