They are not the central factor they used to be.
Such local actions must always be a central factor in this process.
A. The relationship between the young child and his or her parent is a central factor in child development.
The prosecution also referred to two other additional though less central factors in the case.
And that was a central factor in its eventual demise.
"We believe that the economy will be a central factor in the election campaign."
The central factors, in fact, center on "advantages of trade."
These are, most will agree, two central factors in language learning.
But for a variety of reasons, it wasn't yet a decisive or central factor.
But the central factor here is the notion of a closed versus an open system.