User blog comment:Emillianna/What is Lumen Histoire?/@comment-204.10.221.143-20140502114551/@comment-7418318-20140503000109

Fairy Tail was founded 105 years ago.

Zeref is from 400 years ago and only stopped his evil deeds when he started to value Human life. On the plus side, that made him no longer want to kill everyone. On the down side, it made his power go out of controll and kill people by accident.

With him staying in this not dark state of mind until Grimore Heart attacked Tenrou Island, he can't have been a good one who was suddenly overcome by evil at the time FT was founded. At that point of time his powers were not under his control and randomly killed everyone within a few meters of him at the slightest agitation. That would have made it impossible for him to found a guild... or even walk through a town for that matter.