Mont­gomery, a south­ern city in the USA, in 1955. African Amer­i­cans, who make up the major­i­ty of the pop­u­la­tion, are being treat­ed as sec­ond class cit­i­zens. Because of the so-called Jim Crow laws they have to use sep­a­rate restrooms, restau­rants and schools. In the city bus­es, ‘col­ored’ peo­ple can only use the rear seats. In …