This book is an episodic history of the US labor movement. It's not intended to be comprehensive - especially at the rise of labor. It mostly looks at how labor gained power, how it lost power - and the last third of the book discusses current attempts at labor activism to revitalize the movement.
Greenhouse, himself a former NYT reporter on the labor beat, notes that US labor has suffered greater losses than other industrial nations since 1995. Unlike other industrialized nations, it lacks legal right to vacation, paid sick leave, and maternity leave. Weak unions rarely strike. From 2010-17, there was per year just 13 private sector unions strikes featuring 1,000 workers. It was 83 in the 1980s (itself hardly a golden age for the labor movement). From 1948-73, productivity and pay both went up. That's no longer the case. Hourly pay is at its lowest inflation-adjusted level since 1973 now. Meanwhile, CEO pay has gone up exponentially.
The section on labor's rise is especially brief. You get the Progressive Era garment workers organizing, and the Triangle Shirtwaist Fire. Frances Perkins becomes a leading government advocate for labor, eventually ending up in FDR's cabinet. Sit-down strikes help organize industrial labor. The big hero for Greenhouse is Walter Reuther. He helped create the Treaty of Detroit. A long-term contract with a no-strike pledge for the contract - but with a healthy pension, a nice COLA, and good terms for the workers. It becomes a model for other industries, and helps the working class join the middle class. It also discusses the Memphis garbage workers strike that MLK supported at the very end of his life.
The book gets into more detail on the fall of labor. Reagan busted the air traffic controllers strike in 1981, ending the era of labor peace begun with the Treaty of Detroit. Dodge Phelps, the Chicago Tribune, Eastern Airlines, Greyhound, International Paper and others beat unions. There were 289 strikes per year with 1,000+ workers in the 1970s, but only a fraction of that in the 1980s. The old industrial heart was re-Christened the Rust Belt. Truck deregulation hurt teamsters. Lockouts became more common. Labor leaders weren't as inspiring. George Meany had no interest in labor organizing, and when the AFL & CIO merged, the AFL became more like the CIO instead of vice-versa. Meany didn't give a damn about organizing women and minorities. Some unions were pretty corrupt, most obviously the teamsters. Union-busting became its own industry, and often violated the laws, but with minimal legal response. In 2017, Tennessee government officials largely stopped a VW from unionizing, even though VW itself was amenable to unions.
After the decades of being beaten down, Greenhouse notices signs of labor getting worked up in the 21st century. There were attempts by Uber drivers to organize, which is tricky but made more headway than I would've guessed. Labor found a new rally cry that galvanized people: The Fight for $15. It began with fast food workers, and had some success at individual McDonalds locations, but couldn't make headway with corporate offices. So they focused on government laws instead. They had some wins and some losses, but even the losses often caused ripple effects, as places raised wages - not to $15, but more than before. Even states like Arkansas, Alaska, South Dakota, and Nebraska passed minimum wage increases. The Las Vegas culinary union serves as a model for success. It may not be replicable for everywhere but it is still a great success story for labor in the 21st century. Migrant labor even had some success once they focused on places that carried products, getting concessions from McDonalds and Taco Bell on where they get their tomatoes from, and most remarkably of all getting a concession from Wal-Mart. Los Angeles became union-friendly.
Overall, it's a good book. It's good too much history to really be about current life, but it's better on current issues than the history of it.