Charles Koch told attendees of his California summit this weeked that he and his brother’s conservative activism is akin to the anti-slavery and civil rights movements, the Washington Post reported.

“Look at the American revolution, the anti-slavery movement, the women’s suffrage movement, the civil rights movement,” Koch said Sunday. “All of these struck a moral chord with the American people. They all sought to overcome an injustice. And we, too, are seeking to right injustices that are holding our country back.”

The remarks kicked off a session on strategy, as the Kochs look forward to a campaign cycle in which they, through their various organizations, vow to spend nearly $900 million. According to the Washington Post, Charles Koch’s comparison Sunday comes along with a larger campaign to improve the image of the brothers’ efforts among the public.

“If we cannot unite the majority of Americans behind the vision, then we’re done for,” Koch said. “So that, to me, has to be our number one objective. But to do so, we’ve got to do a much better job of understanding what matters most to people and then to demonstrate that a free society gives them the best opportunity of achieving that.”

A number of 2016 GOP candidates appeared at the summit.