"If we and the rest of the backboned animals were to disappear overnight, the rest of the world would get on pretty well. But if they were to disappear, the land's ecosystems would collapse. The soil would lose its fertility. Many of the plants would no longer be pollinated. Lots of animals, amphibians, reptiles, birds, mammals would have nothing to eat. And our fields and pastures would be covered with dung and carrion. These small creatures are within a few inches of our feet, wherever we go on land — but often, they're disregarded. We would do very well to remember them."
–Sir David Attenborough, in closing of the "Life In The Undergrowth" documentary.
I must have told you a hundred times how much I love the awesome Life in the Undergrowth insect documentary. It's probably the best insect documentary ever made!
While I enjoy every single minute of the 5 episodes x 50 minute series, it's the closing by Sir David Attenborough that really moves me deeply.
You have read the words, now see the short clip which i extracted, and hear it from Sir David Attenborough himself.
Go search for more clips of the series on youtube. Better still, get the DVD. The article on Wikipedia on "Life In The Undergrowth" is an excellent read too.