User blog comment:FairyRaven/Fairy Tail Chapter 453: A Father's Job, Review and Commentary/@comment-26287497-20150920142614/@comment-7418318-20150920162116

!!RAVE SPOILER!!

In a way he was right in what he said. The world they lived in was an unnatural one created through cheating death more or less, when in the true timeline the planet would have died.

While extremely fanatic, he's actually right... or rather he was right until he decided that he and Elie should repopulate the true world once the false one is destroyed.

But this argument also shows that while on the surface they might be similar, they are actually different. Lucia wanted to restore the true timeline and then continue mankind in a better way, by raising it new from the ground up.

Zeref wants to eradicate mankind and give the planet over to the other species in the hopes that they are better than mankind... which brings me to another question: What about the other sentient non-Human species like the Frog- and Lizardmen, to some extend the Vulcans and now that they live in Earthland I suppose also the Exceed? Does he want to eradicate them too, or "just" the actual Humans?