[trisham]

I think the thing that really made the first two movies was Robert Duvall's portrayal of Tom Hagen. On the surface he was very calm and nonviolent, but in reality he was possibly the coldest and most ruthless of all.

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Yes. As perhaps the best example, he had a hand in Kay's abortion, and possibly some influence. It's also made quite clear that he was adopted, and seemed always to be trying to prove himself to Vito and Michael. Until the abortion, that is, and then his motives seem much more complicated.

[wagglebee]

I always thought that the abortion was Kay's idea and that he just helped facilitate it.

He for certain orchestrated the murder of the prostitute that they used to blackmail the senator.