Sedition is overt conduct, such as speech and organization, that tends toward insurrection against the established order. Sedition often includes subversion of a constitution and incitement of discontention (or resistance) to lawful authority. Sedition may include any commotion, though not aimed at direct and open violence against the laws. Seditious words in writing are seditious libel. A seditionist is one who engages in or promotes the interests of sedition.
Typically, sedition is considered a subversive act, and the overt acts that may be prosecutable under sedition laws vary from one legal code to another. Where the history of these legal codes has been traced, there is also a record of the change in the definition of the elements constituting sedition at certain points in history. This overview has served to develop a sociological definition of sedition as well, within the study of state persecution.
The term sedition in its modern meaning first appeared in the Elizabethan Era (c. 1590) as the "notion of inciting by words or writings disaffection towards the state or constituted authority". "Sedition complements treason and martial law: while treason controls primarily the privileged, ecclesiastical opponents, priests, and Jesuits, as well as certain commoners; and martial law frightens commoners, sedition frightens intellectuals."
Australia's sedition laws were amended in anti-terrorism legislation passed on 6 December 2005, updating definitions and increasing penalties.
In late 2006, the Commonwealth Government, under the Prime-Ministership of John Howard proposed plans to amend Australia's Crimes Act 1914, introducing laws that mean artists and writers may be jailed for up to seven years if their work was considered seditious or inspired sedition either deliberately or accidentally. Opponents of these laws have suggested that they could be used against legitimate dissent.