Down to earth

Let's shit can all the layers of abstractions for
a moment...

"Humankind--despite its artistic pretensions,
its sophistication, and its many accomplishments--
owes its existence to a six-inch layer of topsoil
and the fact that it rains." -- Source unknown

I could ask The Question that I usually ask here,
but I won't. You regular readers know what it is.

Via Bill St. Clair