"SO FUCK THE SYSTEM! YOU CAN BRING IT DOWN!"
- – The Exploited, "Fuck the System"
The Revolutionary League, also known as the Anarchists, are a Faction in Planescape defined by their belief in the injustice and oppression of the existing forms of government throughout the multiverse. As such, they seek to topple the Powers That Be and give everybody the freedom to seek what the True Meaning Of It All is.
In practice, they're a borderline Chaotic Stupid bunch of rabble-rousers who are more of an annoyance than anything serious and who can't agree on anything as a coherent belief greater than "we got to bring down the other Factions".