"Doctor, I have an ear ache!"
2000 BC : "Here, take this root!"
1000 BC : "Tha root is heathen, say this prayer!"
1850 AD : "That prayer is superstition, drink this potion!"
1940 AD : "That potion is snake oil! Swallow this pill!"
1985 AD : "That pill is ineffective, take this antibiotic."
2000 AD : "That antibiotic is artificial and cancer–causing!
Here, eat this root!"