Collectively. The quote is inspired by my reading of Drawdown, a book of solutions to global warming (with a tip of the hat also to Chris Wark, in an unrelated context). The world is all reading a larger book, The Book of Life on Planet Earth (metaphorically), but of course some have barely begun reading while others have almost finished! In other words, we are not all on the same page – or even on the same chapter. My earlier quotes refer.