What Happened to the Malagasy Tribes?

The diversity of islands didn't entirely there wasn't a theory to explain it, i guess. Yea. And of course there are the other undiscovered places that were equally unusual, that would be found later. So prior to the arrival of the europeans, there were malagase tribes who did the usual, you know, they fought wars against each other to capture prisoners and enslave them. The same thing happened in so many places. Obviously, slaves become even more valuable now they are getting premium prices.