For several years now, debate has been waged about modernizing labor u
nions. What new conceptions of employees' interests can the unions wor
k out as the workforce is diversifying, egalitarian norms are wearing
thin, economies are being globalized and the law of the marketplace is
tightening its hold? By referring to the labor movement's history, th
ree questions are raised that call out for answers. Whose interests do
the unions represent? How are these interests classified by order of
priority? What organizational solutions can be imagined for satisfying
them? By exposing these problems, it is shown that the quest for soli
darity a never achieved goal, has always been contradictory for the la
bor movement. Given that the achievements from past struggles are comi
ng under attack given the risk of solutions being reduced to microcomp
romises, given that losers and winners are ever more visibly distingui
shed, new approaches are suggested for the unions to explore in the qu
est to build other forms of solidarity.