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They are more likely to evolve in the time and place which is friendly to the social movements: hence their evident symbiosis with the 19th century proliferation of ideas like individual rights, freedom of speech and civil disobedience. Social movements occur in liberal and authoritarian societies but in different forms. These new movements are activated by a wish for change in social customs, ethics and values which oppress certain communities. The birth of a social movement needs what sociologist Neil Smelser calls an "initiating event": a particular, individual event that will begin a chain reaction of events in the given society leading to the creation of a social movement. The root of this event must be the result of some common discontent among a community. Hence, making "emergence" the first step to a social movement. This discontent will act as the chain that links common people together, as they share the same experiences and feelings of oppression. "Within this stage, social movements are very preliminary and there is little to no organization. Instead this stage can be thought of as widespread discontent (Macionis, 2001; Hopper, 1950)." Emergence is prior to any sort of organized resistance to the condition of society. Jonathan Christiansen's essay on the four stages of social movement dissects further into the historical sociology of how each stage affects the whole movement. The Civil Rights Movement's early stages are an example of the public display of protest that is utilized to push a movement into the next stages. "It was not until after the Brown v. the Board of Education Supreme court decision (1954), which outlawed segregation in Public schools, and following the arrest of Rosa Parks in Montgomery, Alabama for refusing to comply with segregation laws on city buses by giving up her bus seat to a white man, that the American Civil Rights Movement would proceed to the next stage – coalescence." The impact of a black woman, Rosa Parks, riding in the whites-only section of the bus (although she was not acting alone or spontaneously—typically activist leaders lay the groundwork behind the scenes of interventions designed to spark a movement). This leads into coalesce because now the common dilemma and source of oppression is being pinned down, allowing for organizations and appearance to the public eye to be established. The Polish Solidarity movement, which eventually toppled the communist regimes of Eastern Europe, developed after trade union activist Anna Walentynowicz was fired from work. The South African shack dwellers' movement Abahlali baseMjondolo grew out of a road blockade in response to the sudden selling off of a small piece of land promised for housing to a developer. Such an event is also described as a "volcanic model" – a social movement is often created after a large number of people realize that there are others sharing the same value and desire for a particular social change.