...The History of Medicine ... (joke - or maybe not)
I have an ear ache.
3000 BC : Eat this root.
300 BC: That root is heathen, say this incantation.
1800 AD: That incantation is superstition, drink this potion.
1910 AD: That potion is snake oil, take this pill
1950 AD: That pill is ineffective, take this antibiotic.
2000 AD: That antibiotic is artificial, eat this root.