Is the preposition in grammatical here? Is there a grammarians' consensus as to the usage of impact (as a verb)? Nowadays, we often see the word impact being used as a verb.
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Impact (early 17th century) comes from the past form of the same source.
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My question is, should it be always followed by the preposition on? This change has no impact on the system's. Oxford dictionaries gives the following. Purely aesthetically, i'd prefer impact on, although the transitive form is useful in the passive.
But ngram for impacted him vs impacted on him shows the version without. Should it always take the preposition on or is it a matter of personal preference? The use of impact as a verb to indicate greater effect seems to have come into use in the 1960s. I think we should have used on instead:
Her speech made a profound impact on everyone.
