50 POINTS PLEASE HELP ITS DUE AT 11:59 and I haven't started it

Oh I see it now, I didn't see it before. (Wifi slow)

Explanation:

1. The global era increased drastically (I think that is how you spell it) probably because we have better improvement.

2.  The semi-nomadic era stayed neutral for a long time.

3. The era of city-states started to figured things out. (I don't know what to put for number 3.)

I think that now that we have the technology, it helps us figure things out and we are way more advanced than we were years (YEARS) ago.

I wonder why the semi-nomadic era didn't increase till many years later because after that it started to increase slowly by a lot.