Very sad news.
I remember the Monkees from my childhood. I'd have been 9 or 10 when they exploded onto our screens.
The songs were pure pop of course, which some like to sneer at, but I defy anyone not to sing a long with the lines:
Cheer up, Sleepy Jean
Oh, what can it mean
To a daydream believer
And a homecoming queen
And it may be just me, but this song for reasons I can't quite identify provokes both a smile and tears from me. A happy/sad song if you will.
Nesmith showed his own skills as a songwriter with "Listen to the Band" towards the end of their initial recording career, which has always impressed me.