For them, the driving impulse was a desire to give back, a wish to share expertise honed over a long career, or concern about the world they are passing to their grandchildren.
His driving impulse as a writer is not the return of the native, revelling in his country's inglorious past.
That said, harmony often takes a back seat to rhythm as the driving impulse of "Evryali".
In recounting the slow, sometimes apprehensive circling of these characters around one another, Mr. Frazier displays a keen psychological understanding of their fears and desires, and their driving impulse to keep themselves safe, at any cost.
As he traveled through Africa, Lewis observed governments "moving heaven and earth to keep their people alive, and nothing will stop that driving impulse".
The pairs of pianos and vibraphones provide the driving impulse and map out the tonal shifts of the music, while the other instruments pick out melodic shapes above them.
Zavvi's business has largely been picked up by rival specialist HMV, but Woolworth's role of driving impulse DVD purchases from parents popping in for essentials such as baby vests and school uniforms has not fully been handed on to another high street chain.
The driving impulses of Ms. Murthy's dancing were a little abrupt sometimes.
As ever, sex, religion and disgust seem to be Cave's driving impulses – though where less committed performers would simply lapse into pornography, he realises the power of more subtly transgressive expeditions "deep in the weeping forests of le vulva", as he puts it in "Albert Goes West".
Despite all these picaresque elements, there is a driving plot impulse that keeps things moving.
But there's a driving narrative impulse, and, however silly, a kind of idealism, a sense that it's exciting to make contact with whatever's out there.
