With the end of slavery in the U.S.A., most Black Christians set up their own churches, and later some of these churches gave birth to the massive Pentecostal movement, which deeply influenced many white churches and swept over much of the world. Cox traces this growing movement down the decades and over several continents. He deals in stories of seemingly ordinary people who caught a passion for breaking down walls between hearts. Many of these are women, such Lucy Farrow, Marie Burgess, Florence Crawford, Maria Woodworth-Etter, or Aimee Semple McPherson, who walked out of a church which could not respect her gifts, and built her independent Church of the Four Square Gospel in the 1920s, which had over 25,000 affiliated churches in 74 countries by the 1990s.
The movement Cox describes is different in spirit than fundamentalism. Though it is subject to corrupt leaders or cheap commercialization, it is also full of local heroes like evangelical politician Benedita da Silva, who stresses Jesus' promise to the slum dwellers of Rio de Janeiro: "Imagine, we will do greater things than he did". (p. 166) In all, Cox gives a report which is properly respectful for the power and magnitude of popular religion, made down home in local people's hearts.