An excellent history of the long struggle for, and eventual victory of, industrial unionism in the Chicago stockyards, but doesn't accomplish all that it sets out to. Halpern wants to use the stockyards experience as a case study for the relationship between race and class in US history, to fill the "white blindspot" in American labour history (in a very '90s way). He sets up a three-part timeline, with a first period up to 1929 where racial and ethnic divisions prevailed among the packinghouse workers, a second in the 1930s and '40s when interracial unity enabled the formation of the Packinghouse Workers Organizing Committee and then the United Packinghouse Workers of America, and finally a third in the 1950s when Black workers effectively made the union their own and (non-leftist) white workers withdrew from active engagement.
The three periods don't receive equally compelling treatment. The core section on the period of unity is a fantastic portrayal of how CIO unions were built; how they overcame ethnic and racial divisions, the role of the Communists and other leftists, a microcosm of how the CIO influenced the emerging New Deal order in the wider community (churches, the Democratic party, neighbourhood groups, etc.)
The book also provides a fascinating account of the way Black workers' attitudes towards and approach to unionism changed. While his treatment of early racial conflict in the stockyards leaves something to be desired, he acknowledges that Black workers' rejection of unionism in the first decades of the 20th century was basically rational. Their shift in the era of the CIO into being industrial unionism's most enthusiastic adherents is shown not as a benevolent gift by white unionists (even white Communists, who rightly receive positive treatment for their role) but as a changed calculation by Black workers themselves on how best to advance their struggles in the plants and in the wider community.
But Halpern's analysis of those periods in which racial division prevailed is much weaker, because despite his avowed purpose of overcoming labour history's white blindspot, he never really puts his finger on *white workers' racism* analytically. White packinghouse workers' racism in the early 20th century is treated in an economistic fashion as a simple response to the companies' use of African Americans as strikebreakers. While he cites Roediger in his introduction, Halpern doesn't seem to have taken the arguments of The Wages of Whiteness on the ways white workers' racism stemmed from deeply-held elements of their self-conception as 'free white workingmen' into account in understanding why, on his own evidence, a Black scab was treated as a greater offense or threat than a white scab. Likewise in his discussion of the 1950s he mentions that the transfer of the UPWA headquarters to a Black neighbourhood contributed to declining white participation, citing racist statements by white members about how afraid they'd be to travel there, without connecting it to the wider segregationist mobilization in postwar white Chicago, which he had already discussed in the context of the way Black workers mobilized union strength to resist it. Both show an inability (unwillingness?) to recognize the autonomous effects of white workers' racism and the influence of the wider society's racism on relations within the workplace and union.