Imagine stepping into a gigantic elevator reaching to the stars. A voice comes over the PA speaker "Ground floor, the extinction of humanity. Going up." As you ascend the outlook becomes much less...cataclysmic. That's the great thing about looking up from rock bottom; you are as low as you can get, but you can see where you could be. The only thing left to do is start putting one had over the other and climb.
Do yourself a favor and read this timeline about the continued rise of humanity.