2000 BC: Here, eat this root.
1000 AD: That root is heathen. Here, say this prayer.
1850 AD: That prayer is superstition. Here, swallow this pill.
1985 AD: That pill is ineffective. Here, take this antibiotic.
2000 AD: That antibiotic doesn’t work. Here, eat this root.
Short and sweet and I love it!