driving force

That desire for escapism has been Murray’s driving force since childhood.

Roberts cited vague notions of “self-government” as the driving force in his desire for the United States to confront China.

“I had no idea until we spoke about his music that he was such a driving force lyrically,” McLean said.

The Prince of Wales says “inspiration and guidance” from his mother, Diana, has been a driving force behind his personal commitment to tackle homelessness.

In fact, one of the driving forces behind right-wing populism and authoritarianism is that it’s a reaction to the breakdown of these binaries and the social changes that have resulted.