The phrase "a decisive force for" is correct and usable in written English.
It can be used to describe something or someone that plays a significant role in influencing or determining an outcome or situation.
Example: "The new policy proved to be a decisive force for change within the organization."
Alternatives: "a key driver of" or "a significant contributor to".
It may pick itself up, and emerge standing proud and erect, having been a decisive force for good.
At a time when Nkrumah was discussing the Congo crisis, and the disposition of the East west relations which were perceived as doomed and leading inevitably toward armed conflict, (Nkrumah 1961), in his book entitled I Speak Freedom (pp. 280 281) stated: "The Afro-Asian nations, if they act together, might prove strong enough to be a decisive force for peace in the world".
This agitation led eventually to a decisive force of 180,000 black soldiers joining the Union army.
With rich empirical detail and theoretical sophistication, the book makes a convincing case that business coalitions were a decisive force in the rise of carbon markets as a dominant governance mechanism for addressing climate change.
African-American voters were a decisive force in the election, showing up in huge numbers and casting nearly all their votes — 96percentt — for Mr. Jones.
And they are expected to be a decisive force in choosing the party's presidential nominee.
But in our fast-paced and highly integrated world, communication, more than ever, is a powerful and decisive force for career success.
Summing up its record under his tenure, Ada Louise Huxtable, the architecture critic of The Times, said in 1974 that the commission had "become an unexpected and decisive force for neighborhood stabilization" and found itself "at a new threshold of power and influence".
Kenneth Widmerpool, an object of scorn to his classmates, emerges as a powerful, decisive force, the right man for a mean and mercenary age.
