I think the thing about Macdonald that seems not well enough know is his relationship with others in other areas of golf at that early time (just after the turn of the century and on into the 1920s).
We see him as this dominant figure in architecture, and he probably was considered that for a time.
But it's his relationship within the USGA (and R&A) that interests me most and his relationship with some of the people of that time such as those who started Piping Rock, Lido and particularly The Creek. A few of those men were one and the same, even a few having to do with the USGA. One needs to not just look at Macdonald in a vacuum in those times but to look at those other men too.
If you think he dominated them and got his way, I believe you'd be wrong. The reasons why he may not have been able to dominate them is definitely of historic interest in a number of ways. And in the fact that he may not have been able to be more influential in some of those avenues and what that meant to him, how that may've influenced his attitude generally, and not in a positive way for him, is of real interest, I think.
It seems even in architecture, as time went on, the dominant role he may've originally had or wanted to have began to wan. The fact is that a number of other prominent architects were going in other directions from Macdonald's model in the type and style of architecture they were producing and evolving. Some such as Tillinghast even seemed to get vocal about it which I never previously realized.
The thing I think I notice about Macdonald through that era is that not getting his way obviously frustrated him and perhaps actively depressed him but that he was the type of dominant and powerful man who was remarkably intuitive about sensing when he'd met his match.
That kind of thing alone is historically very interesting, in my opinion.
When one runs into problems and fails to get his way there is a cliche that one sometimes may use. It is;
"I can't fight City Hall."
I believe in some areas of golf Macdonald realized that a whole lot earlier than some of us realize. And I think it took a toll on him that some of realize less.