You’re a white lady, Meryl Streep. I’m also a white lady. It is because of our shared whiteness that I feel compelled to notify you that your characterization of white people on Thursday—that “we’re all Africans, really”—is false.
It’s true that our species, Homo sapiens, evolved on the continent some hundreds of thousands of years ago. But when our early common ancestors started to migrate out of Africa (hey, remember when you starred in that that romantic, racist, colonialistfantasy in the ’80s?) between 125,000 and 60,000 years ago, they were barely even humans. In fact, almost as soon as Homo sapiens evolved from Homo erectus, they began to decamp the continent, becoming, in your parlance, Asians and Europeans. Since their original land mass was not yet called Africa—the word has origins in ancient Rome—it’s a safe bet that these early ancestors did not identify one another as Africans. Neither should you.
Even if that weren’t so, claiming African ancestry when you have none, at least not in the past few millennia, is insulting to people whose actual family history roots them in that continent and the diverse cultures, triumphs, and struggles it’s seen.