Passive resistance or civil disobedience can be envisaged as the use of inertia as a weapon. By refusing to comply with orders or to perform normal activities (e.g. sitting in roads and blocking traffic) the protestor can tie up law enforcement and cause disruption without aggression.
Since maintaining a passive, nonviolent approach to protest requires tremendous discipline, frequently directly in the face of police brutality, many peaceful demonstrations break down into more violent, active events (e.g. throwing stones, etc.).
Passive resistance is invariably used by the "underdogs" against authority, although it invariably accomplishes nothing without at least a credible threat of violence backing it, if not outright armed insurgency.
Not to be confused with passive aggression, which is just obnoxious.
 Examples of passive resistance
- Loosely, during the Irish Land Wars (1870 - 1890 sporadically) General Boycott was ostracized and many thousand law officers were deployed at great expense - hence the term 'boycott'.
- Henry David Thoreau went to jail rather than pay a tax in support of the Mexican-American war, which would also would have extended the institution of slavery.
- The British "suffragette" movement used passive resistance to great effect (chaining themselves to doors and vehicles, etc.).
- Mohandas (Mahatma) Gandhi's opposition to British rule in India is often used as the classic example of passive resistance. He used other words and added a spiritual element to his actions, calling the resulting practice Satyagraha, which he distinguished from passive resistance.
- Rosa Parks and other African-Americans were arrested for sitting in areas on buses and other public places that were reserved for "whites-only" in the course of a campaign against discrimination.
- 'Sit ins' are often used as a means of protest. Road construction, airport runway extension and access to government or military facilities have all been opposed or prevented by masses of people lying or sitting down to prevent access. A forefather to the sit-in was the sit-down strike, in which workers would refuse to leave their place of work. These were first used by IWW workers during the early 20th century, and was most dramatically used in Flint, Michigan by UAW workers. The sit-in was widely used in the American Civil Rights Movement, with examples in Wichita, Kansas, Oklahoma City, and the most famous in Greensboro, North Carolina, among many others. It was also employed by Gandhi's non-violent resistance movement, and remains a popular means of protest to this day.