After divvying up workers like this (and perhaps he does so with too broad of strokes), Temin explains why there are such stark divisions between them. He focuses on how the construction of class and race, and racial prejudice, have created a system that keeps members of the lower classes precisely where they are. He writes that the upper class of FTE workers, who make up just one-fifth of the population, has strategically pushed for policies—such as relatively low minimum wages and business-friendly deregulation—to bolster the economic success of some groups and not others, largely along racial lines. “The choices made in the United States include keeping the low-wage sector quiet by mass incarceration, housing segregation and disenfranchisement,” Temin writes.

And how is one to move up from the lower group to the higher one? Education is key, Temin writes, but notes that this means plotting, starting in early childhood, a successful path to, and through, college. That’s a 16-year (or longer) plan that, as Temin compellingly observes, can be easily upended. For minorities especially, this means contending with the racially fraught trends Temin identifies earlier in his book, such as mass incarceration and institutional disinvestment in students, for example. Many cities, which house a disproportionate percentage of the black (and increasingly, Latino) population, lack adequate funding for schools. And decrepit infrastructure and lackluster public transit can make it difficult for residents to get out of their communities to places with better educational or work opportunities. Temin argues that these impediments exist by design.

Despite the bleak portrait that he paints, he doesn’t believe that the U.S. necessarily has to be like this. He offers five proposals that he says might help the country return to more equal footing. Some are fairly clear levers that many before him have recommending pulling: expanding access to and improving public education (particularly early education), repairing infrastructure, investing less in programs like prisons that oppress poor minorities, and increasing funding for those that can help build social capital and increase economic mobility. But other suggestions of his are more ambitious and involve fundamentally changing the cultural beliefs that have been reinforced over generations. Temin advocates doing away with the belief that private agencies can act in the interest of all citizens in the way that public entities can, and should. His final recommendation is to address systemic racism by reviving the spirit of the Second Reconstruction of the 1960s and 1970s, when civil-rights legislation helped to desegregate schools and give black Americans more political and economic power.

Temin notes that not all of these things need to be accomplished in order for America to reverse the increasingly divided path it’s on. But at the moment, implementing even one of these recommendations would prove a tall order.