“Doctor, I have an ear ache”
2000 BC
“Here, eat this root”
1000 BC
“That root is heathen, here say this prayer”
1805 AD
“That prayer is superstition, here drink this potion”
1940 AD
“That potion is snake oil, here swallow this pill”
1985 AD
“That pill is ineffective, here take this antibiotic”
2012 AD
“That antibiotic doesn’t work anymore, here eat this root…”
(author unknown)