The phrase "a primary force behind" is correct and usable in written English.
It can be used to describe a significant influence or driving factor in a particular situation or outcome.
Example: "The scientist was recognized as a primary force behind the groundbreaking research in renewable energy."
Alternatives: "a key driver of" or "a major contributor to".
One of the interns, Juan Perez, was a primary force behind the Julia de Burgos Pocket Park.
"People are always telling me I need to do more charity work," said Ms. Campbell, who, it is often forgotten, was a primary force behind successful benefits to raise relief funds after Hurricane Katrina and again after the devastating earthquake in Haiti last January.
This general observation supports that protein-protein interaction is a primary force behind intra-nuclear organization.
Lamar Smith, a congressman from Texas, was the primary force behind a set of sweeping reforms to both legal and illegal immigration.
Dziga Vertov, a pioneering filmmaker and primary force behind the documentary Kino-Eye collective, was a big part of this new world's art, where the camera lens and film create new ways of seeing.
Mr. Pataki was the primary force behind a proposed amendment to the State Constitution, ultimately defeated in 1997, to permit non-Indian casinos in resort areas like the Catskills.
Then, too, since World War II, the United States has been the primary force behind a number of astonishing transformations in the international order -- everything from rebuilding Germany and Japan, to the defeat of the Soviet Union and the reintegration of Eastern Europe and even of Russia into the democratic fold.
Women are now the primary force behind an explosion in new cocktail concoctions, and men are simply going along for the ride, say bartenders and liquor marketing executives.
For Microsoft, this is familiar territory, as it is the primary force behind the Business Software Alliance, an industry group that fights against software piracy both in the U.S. and around the world.
The primary force behind the prosecution is a holdover from the Mubarak era, Fayza Abul Naga, who has continued to press the case against the democracy groups, despite opposition from military rulers worried about losing American aid, most of which goes to the armed forces.
According to Jennifer Podkul of the Women's Refugee Commission, an NGO that works with displaced women and children, a spike in violence throughout impoverished Central America is the primary force behind the rise in youth migration.
