Some will counter by calling humanity a cancer upon this earth. Fie. Nature, for all its beauty is not ethically pretty. Life feeds on life. The world-without-man is no guide for moral living. It is, by and large, amoral. The awesome power of humanity is only further evinced by its impact upon the globe. Consider its scientific feats, its aesthetic achievements, its incredible willingness to crash in upon itself through war and economic strife. Humanity's arm is as God's. It's voice thunders across the globe. It is decked in majesty and excellency, arrayed with glory and beauty. It casts abroad the rage of its wrath. It looks upon every proud beast, and debases him, bringing him low, and hiding him in the dust; binding his face in secret. Even the Christian God would confess man is capable of bringing about his own salvation. --Further rambling which may readily be ignored:-- But, while the human race is amazing, most humans are less impressive. Most humans kind of suck. So...
Anything, everything, and nothing at all for years at a time.