The writer of the hit children’s series took part in a Facebook Live chat for her charity Lumos, chaired by broadcaster Lauren Laverne, to publicise the plight of the 8 million children around the world who are living in orphanages.
Rowling, who founded the non-profit organisation 10 years ago, said: “All of the research agrees that there’s little you can do worse for a child than put it in an institution.”
She said of people donating money to overseas orphanages: “We want to help children and that’s an honourable and admirable thing. However, you may be contributing towards real harm.”
The author added: “If you take nothing else away tonight, I’d like you to remember this is a solvable problem.
“Eight million children is an unfathomably large number – it’s so hard to really take in what that means, eight million – but we can solve it.”