Perhaps, it can be said, we met our end the moment we set our eyes on the prize.
Addendum: Seriously, though: Probably in the cheapo '70s, things started on their long decline, with things bottoming out in the early '90s.
I default to Sumatran beans, though Latin American will frequently surprise me. This is going to fly in everyone's face, but years back I would frequent (and love) the Cafe' Juan Valdez in Times Square.
I thought about launching an investigation into my own local bathroom offender, but I immediately figured out who was behind all those sanitary wipes; there's a jar of them right across from his cubicle. It would not have been a detective saga as epic as this one.
Same here. But there was that one time, after eating too much gelato, in Castelldefels, Spain......but, getting back to the point, I think it can be mostly traced to poor diet and a lack of consideration.
Everyone thinks they're too good to clean up after themselves; that's part of the problem. It's like the internet; everyone is vaguely anonymous, so they leave their disgraceful mark on the world with little chance of impunity.
edit: Also, they eat too many cheeseburgers.