“When we talk about uber-capitalism in its rawest form – about greed that knows no limit, about corporations that viciously oppose the right of workers to organize, about the abuses of wealth and power that tear apart our society – we’re talking about Amazon,” writes Bernie Sanders in his new book. “And when we’re talking about Amazon, we’re talking about Jeff Bezos.” These are typical lines in what comprises an attack on the status quo from every conceivable direction. Sanders addresses his own two ultimately thwarted campaigns to lead the Democratic party; the crisis in American healthcare and the chasms of health inequality shown up by Covid; the declining union movement and stagnation of wages; the burgeoning billionaire class and its impact on democracy; and the looming environmental crisis. Nothing he says will come as any surprise to his supporters, who are legion. Everything he says is quite unfashionable, from the macro – greed is bad, actually – to the micro, still using “uber” to mean “ultra”, as if Uber itself didn’t exist. He has no compunction about his reference points, which go from the obvious (F Scott Fitzgerald observing that thing about the rich) to the niche (a union organiser and folk singer named Florence Reece, who wrote a song in the 1930s called Which Side Are You On?). If his ideas were a band, they’d be the Ink Spots, with songs written a long, long time ago, and all the intros the same. These aren’t complex propositions. Of course it’s wrong to profit from other people’s illness; of course when access to healthcare is tied to work, that puts citizens in a state of semi-bonded servitude. Of course corporations are actively anti-social, of course they have driven down wages over 50 years and immiserated the workforce. Of course when three firms – BlackRock, Vanguard and State Street – control assets equivalent to the GDP of the entire United States, we’re into the rotting phase of late-stage capitalism. Sanders’ popularity and his immense value to the political ecosystem stems from his willingness to say all this out loud, defying the credo which has defined mainstream discourse since at least the Clinton era: that the class war is over, that capitalism is as inevitable as the weather, and that markets don’t need morals, because they have their own separate schematics, drawn by an invisible hand. In other words, his book is easily as frustrating and depressing as it is galvanising and uplifting; reading one story or statistic after another, about growing inequality, child poverty, financial insecurity – 77% of Americans are now anxious about their financial situation – one’s very lack of surprise reinforces a sense of hopelessness. Yet, particularly in the early chapters, which cover the intricacies of both Sanders’ 2016 and 2020 campaigns, and his (also often thwarted) work as the chairman of Congress’s Budget Committee since the election of Joe Biden, you cannot ignore the fact that the wind has changed. Precisely because Sanders is such a straightforward thinker and writer, he insists on some facts that the political establishment – on both sides – wilfully ignores. It is objectively better, more democratic, more plural, when a campaign is funded by grassroots donations than when a candidate has to go cap in hand to Peter Thiel. The Democrats do better in the polls when they allow in their left flank, rather than try to erase it in the name of electability. And at the level of the principle, to let the man himself take over, “wars and excessive military budgets are not good”; “carbon emissions are not good”; “racism, sexism, homophobia and xenophobia are not good”; “exploiting workers is not good”. This isn’t the book to come to for new ideas, in other words. But it’s a capitalist fallacy that everything has to be new, in any case. It’s OK to be Angry About Capitalism by Bernie Sanders is published by Allen Lane (£22). To support the Guardian and Observer order your copy at guardianbookshop.com. Delivery charges may apply.