Here’s a short history of medicine —

I have an ear ache.

2000 BC: Here, eat this root.

1000 AD: That 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. Here, eat this root.