“All of these movements”? Yes: The demands of the fast-food workers movement — $15 minimum wage and a union — have helped to unite movements among airport workers, hospital workers, retail workers and more.

There are already results. Two years ago, there was talk of raising the minimum wage to $10; now $15 per hour is seen as the bare minimum. Seattle and San Francisco have already mandated this, Chicago’s City Council voted to gradually increase to a $13 minimum by 2019, Oakland will move to $12.25 in March and a proposal is being considered in Los Angeles. (And although the amounts were woefully inadequate, four red states voted to approve minimum wage increases last month, showing that the concept resonates across party lines.)

Meanwhile, the credibility of those who argue that employers “can’t afford” to raise pay — McDonald’s paid its C.E.O. $9.5 million last year — is nil. For one thing, there are examples of profitable businesses that treat their employees decently, and even countries where fast-food workers can make ends meet. And for another, underpaying workers simply shifts the cost of supporting them onto public coffers. As Senator Bernie Sanders of Vermont says, “In essence, taxpayers are subsidizing the wealthiest family in America.” That would be the Waltons. (Incredibly, many Republicans still want the working poor to pay more taxes.)

Then, of course, there are the matters of justice and morality. It simply isn’t right to pay people a sub-living wage with no potential for more, and as the comedian Chris Rock says, employers would pay even less if they could get away with it.

The #blacklivesmatter movement — there’s no better description — is already having an impact as well. Don’t think for a second we’d be having a national debate about police brutality (one that includes many on the right), or a White House plan to examine and fix law enforcement, without demonstrations in the streets.

The initial Obama plan is encouraging but lacking, and that’s all the more reason to keep demonstrating. (What good are body cameras, by the way? The videotape of Rodney King’s beating was seen around the world yet resulted in acquittals; Eric Garner’s choking death, viewed millions of times online, didn’t even lead to a trial, even though police chokeholds are banned in New York City.) Besides, as Sanders says, “Even if every cop were a constitutional lawyer and a great person, if you have 30 percent unemployment among African-American young people you still have a huge problem.”

I have spent a great deal of time talking about the food movement and its potential, because to truly change the food system you really have to change just about everything: good nutrition stems from access to good food; access to good food isn’t going to happen without economic justice; that isn’t going to happen without taxing the superrich; and so on. The same is true of other issues: You can’t fix climate change or the environment without stopping the unlimited exploitation of natural and human resources (see Naomi Klein’s “This Changes Everything”). Same with social well-being.