But we don't go that far. Many ignore things like
We are also too clean.
Scientists Discover That Antimicrobial Wipes and Soaps May Be Making You (and Society) Sick
One of the thinkers that really inspires me - Frank Forencich of Exuberant Animal - had a good piece pointing to similar ideas last year:
But it’s more than just immunity. Two recent studies have found strong associations between dirt and mental performance. Mycobacterium vaccae is a natural soil bacterium that appears to increase cognitive performance in rodents, probably by affecting the serotonin system. It also appears to elevate mood, similar to the effect of an anti-depressant.