Perhaps the title and ultimate extinction of the Atlas lion of North Africa is the best example of manmade extinction due to the Romans. The biggest issue is that only certain species can be brought back from extinction. Many species have been extinct for so long that it is impossible to get the genetic material to re-create them (looking at you, Jurassic Park!). A great many more species are simply unknown, extinct or existing, and their passage from the world can go (or has gone) largely unnoticed because people weren’t aware of them in the first place. Of course, it is possible to bring a species back, only to watch it go extinct again. After all, there usually is a reason why a species went extinct in the first place, and if that reason is not addressed, the de-extinction is kind of wasted – like rebuilding a house while a fire is still going on.