Jack of all trades, master of none

Origin

The cutting origins of "Jack of all trades" trace back to the venomous pen of Elizabethan playwright Robert Greene. In his 1592 pamphlet, "Greene's Groats-worth of Wit," Greene launched a scathing attack on the rising star, William Shakespeare, whom he famously derided as an "upstart Crow" and a "Johannes factotum"—Latin for "John do-everything." Greene's accusation was clear: Shakespeare was a mere dabbler, an actor who presumed to write, and a playwright who borrowed from others, rather than a true master of any one craft. This biting criticism solidified the "Jack of all trades" part of the phrase, painting a picture of someone who tries their hand at everything. The "master of none" extension soon followed, cementing the full idiom as a pointed critique of versatility without depth, forever linking it to the envy and rivalries of the 16th-century London theatre scene.