Values Dissonance: Humans showing up in a pristine natural habitat and promptly capturing a (baby!) elephant, a monkey, an ostrich and a bunch of other animals just does not have the same ring to it as it did when this movie was made, with nearly everything going extinct and huge problems with animal trafficking.
Especially depressing with the elephant. When young Francis meets a baby elephant for the first time, he isn't even stunned, as any normal child would be. The first idea that comes to his mind is to figure out a way to tie it up and use it to carry stuff, to make it profitable.