The phrase "a most important influence" is correct and usable in written English.
It can be used to emphasize the significance of a particular influence in a given context.
Example: "The mentor's guidance was a most important influence on her career development."
Alternatives: "a highly significant influence" or "a crucial impact".
When Buddhism reached China, Japan, and Tibet in the opening centuries of the Common Era, it came under the influence of the indigenous faiths, cults, and social structures, and, reciprocally, it became a most important influence, adapting its beliefs and customs to those already established in these regions.
Our data highlights that the use of an appropriate scaffold exerts a most important influence on the applicability of a halogen bonding.
Patterns of spread during Smallpox outbreaks varied with circumstances, but early detection and implementation of control measures is a most important influence on the magnitude of outbreaks.
Without a doubt, the most important influence in Watsuji's early years was the brilliant novelist Natsume Sōseki, considered the outstanding interpreter of modern Japan.
Says Dr. Leslie Sim, clinical director of Mayo Clinic's eating disorders program and a child psychologist, "Moms are probably the most important influence on a daughter's body image".
When considering the effect of indirect exposure to mass media, a husband's exposure is likely to have the single most important influence on a woman.
While parents will always be the most important influence on a child's early life, introducing them to a preschool environment provides them with a new perspective on the importance of education that will remain with them throughout their schooling journey.
Dr. Earls and his colleagues argue that the most important influence on a neighborhood's crime rate is neighbors' willingness to act, when needed, for one another's benefit, and particularly for the benefit of one another's children.
A sensitive analysis shows that the most important influence is the wall thickness, followed by the tube diameter and fluid velocity.
My Princeton colleague Larry Bartels sums it up as follows: "Objective economic conditions — not clever television ads, debate performances, or the other ephemera of day-to-day campaigning — are the single most important influence upon an incumbent president's prospects for re-election".
