Dozens of progressive groups said Monday they were banding together in a new coalition to counter the influence of Big Tech — and they will first aim at the targeted advertising that’s the lifeblood of Facebook and Google.

The new coalition of 38 advocacy groups and nonprofits signed a letter calling for a ban on what it called “surveillance advertising.” It said that online ads powered by personal data and behavioral history have enabled radicalization and given tech platforms a dominant advantage over traditional ads bundled with journalism.

“Big Tech will continue to stoke discrimination, division, and delusion — even if it fuels targeted violence or lays the groundwork for an insurrection — so long as it’s in their financial interest,” the letter states.