I was an addict. I was also a selfish, know-it-all asshole. My selfishness was not realizing that poisoning myself was destroying everything and all the people around me. I knew it all and didn’t listen to the folks who cared. I had it all under “control.”
The Earth is a little over 4.5 billion years old. Mammals didn't evolve until 200 million years ago and our own species, Homo sapiens evolved 200,000 years ago. So, humans have been around for a mere 0.004% of the Earth's history. Earth is home to millions of species, yet just one dominates it. Man.