www.alphadictionary.com

I've looked so far in at least a dozen places and all I get
are asphalt, named for its inventor McAdam, and the plant
the nut comes from. But I'll keep looking.

Give us an example of how you might use it, please.

I'm no poet, but I'd go for saying it's stretching the meaning a tad. Then again, poets do get away with a lot of stretching at times. I guess that's why it's called poetic license.

As for macadamize, I can see that used in the sense of macadamize one's heart or soul.

For rhythm and sound, perhaps amalgam would suit? "An amalgam of disparate spirits"?

I reread sardith's original and note she spoke of the "amalgamation" of people. Could she mean that macadam is an amalgamation of stuff for paving, so maybe she could visualize a macadam of supplicants lining up to see the king?

I would be more inclined to use one of the forms of the word, macadam, in the way that Slava suggested, in the arena of the heart:

As for macadamize, I can see that used in the sense of macadamize one's heart or soul.

Though in talking to a High School English teacher I know, he mentioned seeing it used in literature as a pejorative, as if people were the broken up stones of society, to be paved over and walked on. I might also be inclined to use it in that way as well.

Thanks for your input, you are always helpful to me, whether my personal issue is solved, or if not, just for the affirming repartee.
Sardith