From what I've seen, I should say these Martians have civilised themselves out of all emotions, and, I daresay, have fought pitilessly for the possession of the last habitable lands of the planet.
"They've preyed upon each other till only the fittest are left, and those, I suppose, were the ones who invented the air-ships and finally got possession of all that was worth having.

Of course that would give them the command of the planet, land and sea.

In fact, if we are able to make the personal acquaintance of the Martians, we shall probably find them a set of over-civilised savages." "That's a rather striking paradox, isn't it, dear ?" said Zaidie, slipping her hand through his arm; "but still it's not at all bad.

You mean, of course, that they may have civilised themselves out of all the emotions until they're just a set of cold, calculating, scientific animals.

After all they must be something of the sort, for I'm quite sure we should not have done anything like that on earth if we'd had a visitor from Mars.