18th Century - “We’re doomed! We’re going to run out of wood!”
19th Century - “We’re doomed! We’re going to run out of coal!”
20th Century - “We’re doomed! We’re going to run out of oil! And rainforests! And landfill space!”
2050: "Were doomed! Were going to run out of robots!"
2100: (Robots) "Were doomed! Were going to run out of humans!"
“The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary.”
H. L. Mencken
Read more at: http://www.brainyquote.com/quotes/quotes/h/hlmencke101109.html