Without having read the article, as so often is the custom in comment sections, I am UNABLE to prevent myself from recommending the series of documentaries "Lea

Without having read the article, as so often is the custom in comment sections, I am UNABLE to prevent myself from recommending the series of documentaries "Leaving home". Specially the first one. They're all on youtube. "Home" here stands for the familiarity of classical/romantic music ("19th century" but including post-1900 stuff like Rachmaninoff and so on) but also more literally the tonic root of the harmonic system. Episode 1 is very closely about the road to serialism throughout Wagner, Debussy, etc. up until Schönberg's pre-serial and serial works. Then there are episodes about rhythm and folk influences and so on that widen the scope from just serialism. If you have a piano or keyboard at home I also recommend trying some of these tone rows, verifying when they're "true" tone rows, etc. I sometimes try to improvise with common chord progressions with my left hand and tone rows that start (or end) related to the tonal progression to feel how they forcefully disconnect from attempts to think tonally. Of course serialism isn't the definition of modern art music, but it's a mind expander.