Renewal and expansion are contagious in contexts where information is easily distributed. The spread of information about movements resulted in new offshoots of these movements. This is especially true for the spread of ideas. Examples, include: The Celtic Church expanded rapidly because the Celts were widespread in Europe and a network of monasteries was already in place. The Reformation spread rapidly because of the availability of the new teachings in book form due to the invention of the printing press a few years earlier. The gospel spread rapidly among the Momina people with whom I work because of the kinship channels that enhanced the natural flow of information.