SINCE JUNE 21 1970, football fans have been longing for Brazil to gift the world the spirit of samba, the ball-juggling artistry that encapsulated jogo bonita, the romantic, natural brilliance that delivers entertainment and excitement. Brazil’s 1970 World Cup winners did not represent the start of something, that team was actually the culmination of a process that began amid the despair or Rio 1950. By the time the next World Cup came along, Brazil’s 1970 troubadours had mostly gone, with just Piazza, Jairzinho and Rivelino left from the all-star XI. Maybe it was the heat and altitude of Mexico, or perhaps 1970 was a bookend for the crazy and experimental 1960s, but Brazil struggled to replicate the mood of the time. In 1974 and…