We must take a look at the population graphs of Santa Coloma to understand that something very barbarous happened in Santa Coloma in the mid-twentieth century. In 1950 some 15,000 people lived there which may have seemed a lot then, but by 1970 there were already 106,000 and the number was still rising. In profile, the demographic line of the city is a cliff of Dover, a symbol of a great geological break.