You’re never too old to learn. Especially when you start from a base of ignorance.

I didn’t learn about the 1921 Tulsa Race Massacre until 2019, when it came to HBO in “Watchmen.”

And I didn’t hear about the 1969 Harlem Cultural Festival until 2021, when Ahmir “Questlove” Thompson carved a mountain of forgotten concert imagery into a Black Mount Rushmore, creating the documentary “Summer of Soul” for Hulu.

The Tulsa massacre was buried with its victims for reasons that should be all too obvious. And the Harlem Cultural Festival was strangled by the largely white Woodstock — until Thompson brought the late Hal Tulchin’s long-buried footage back to life.

In an interview with The New York Times, Thompson said:

For nearly 50 years, this just sat in a basement and no one cared. … History saw it fit that every last person that was on that [Woodstock] stage now winds up defining a generation. Why isn’t this held in the same light? Why was it that easy to dispose of us? Instead, the cultural zeitgeist that actually ended up being our guide as Black people was “Soul Train.”

We watched “Summer of Soul” last night, and man, what a blast from the past it was. So many cuts from the pivotal days of this whiteboy’s personal soundtrack.

David Ruffin, fresh from an acrimonious split with The Temptations. A young Gladys Knight and the Pips, very much on their way up. Sly & the Family Stone. B.B. King. Hugh Masakela. Stevie Wonder. The 5th Dimension. The Edwin Hawkins SIngers. And artists whose work I didn’t come to appreciate until later, like Max Roach, The Staple Singers, Mahalia Jackson, and Nina Simone.

All of them on stage in Harlem’s Mount Morris Park, playing for a largely Black audience of 50,000 people at a pop, guesstimated at 300,000 over six shows. Admission: Free.

And to think all that sound and glory wound up in a basement tomb, waiting for someone to roll away the stone.