User blog comment:Maki Kuronami/Lesson 25: Knowledge is the most powerful weapon/@comment-7622429-20141003135007

The way I see it, before, in Humanity's early days, the Grimm had every other advantage aside from one thing: the capacity to strivee, to learn, to grow. That ability of Humanity allowed them to soar above their oppressors and discover new techniques that would allow them to push back the creatures of Grimm and enter this so-called "peace".

But now, we see that some Grimm are learning from this prior weakness, and overcoming it over time. Eventually, that prior weakness will become their next advantage that will allow them to rival or possibly surpass Humanity on ALL fronts.