VANCOUVER, British Columbia — Kalle Lasn, the longtime editor of the anticonsumerist magazine Adbusters, did not invent the anger that has been feeding the Occupy Wall Street demonstrations across the United States.

But he did brand it.

Last summer, as uprisings shook the Middle East and much of the world economy struggled, Mr. Lasn and several colleagues at the small magazine felt the moment was ripe to tap simmering frustration on the American political left.

On July 13, he and his colleagues created a new hash tag on Twitter: #OCCUPYWALLSTREET. They made a poster showing a ballerina dancing on the back of the muscular sculptured bull near Wall Street in Manhattan.

For some people they were just words and images. For Mr. Lasn, they were tools to begin remodeling the “mental environment,” to create a new “meme,” the term coined by the evolutionary biologist Richard Dawkins for a kind of transcendent cultural message.