This book is one of several by several authors that grow out of the Culture Matters Research Project of the late 1990s. Mariano Grondona developed the grid of twenty-five elements of culture. A similar approach was developed by the anthropologist Edward T. Hall in his classic study, The Silent Language (1959). Ronald Inglehart has tested data from the World Values Survey and has found considerable correlation to support the Progress Typology about which he written.