Metaphors are a way of learning or understanding a new piece of information by comparing it to a known piece of information (see Conceptual metaphor).
The next milestone in the evolution of social marketing was the publication of "Social Marketing: An Approach to Planned Social Change" in the Journal of Marketing by Philip Kotler and Gerald Zaltman.
Gerald Ford | Gerald Durrell | Gerald Casale | Gerald Gardner | Gerald Scarfe | Gerald Freedman | Gerald R. Ford | Gerald Gardner (Wiccan) | Gerald McRaney | Gerald | Gerald Wilson | Gerald Ronson | Gerald Forsythe | Gerald Brom | Gerald Aungier | Gérald Tremblay | Gerald Templer | Gerald L. Baliles | Gerald Jennings | Gerald Grosvenor, 6th Duke of Westminster | Gerald Edelman | Gerald D. Hines | Sarah Fitz-Gerald | Gerald Stern | Gerald R. Ford, Jr. | Gerald R. Ford-class aircraft carrier | Gerald Rafshoon | Gerald Lee Warren | Gerald Lascelles | Gerald Hayes |