Long ago I survived what I called the "impact" wars of the late 80s and early 90s. I was a technical editor with degrees in languages and literature, and as such I was, and was expected to be, a stickler for strict rules of grammar. At about that time, the business world all at once started using the word "impact" as a verb. Some blamed Peter Drucker, whose first book on management had just come out. Others had no clue where the jargon came from.