The Evolution of Herbs

2000 BC Here, eat this root

1000 AD That root is heathen. Here say this prayer.

1850 AD That prayer is superstition. Here drink this potion.

1940 AD That potion is snake oil. Here swallow this pill.

1985 AD That pill is ineffective. Here take this antibiotic.

2010 AD That antibiotic doesn’t work. Here eat this root.

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