A Brief History of Medicine

2000 B.C. -- Here, eat this root.

1000 A.D. -- That root is heathen. Say this prayer.

1850 A.D. -- That prayer is superstition. Drink this potion.

1940 A.D. -- That potion is snake oil. Swallow this pill.

1985 A.D. -- That pill is ineffective. Take this antibiotic.

2008 A.D. -- That antibiotic is artificial. Here, eat this root.