I first read this in a Facebook comment made by a friend of a friend (thanks Rusty), so I googled it to see who wrote it and did in fact find it online, but no place to contact anyone about provenance. One of the big problems with copyright is trying to find who if anyone has the rights. Failing that we can allow fear of reprisal to prevent us from sharing, and wonderful words, music and art may well wind up lost forever.)
So although I’m not sure who wrote it or where to credit, I’m going to be wild and crazy and assume public domain unless or until someone tells me otherwise, at which point I would take it down. For your reading pleasure I present:
A Short History of Medicine
2000 B.C. – Here, eat this root.
1000 A.D. – That root is heathen. Here, say this prayer.
1850 A.D. – That prayer is superstition. Here, drink this potion.
1940 A.D. – That potion is snake oil. Here, swallow this pill.
1985 A.D. – That pill is ineffective. Here, take this antibiotic.
2000 A.D. – That antibiotic doesn’t work anymore. Here eat this root. . . .
reprinted from Cave of the Word Witch