It is fitting that this special edition of the Journal of Health Communication is dedicated to the evidence for the effectiveness of behavior and social change in child survival and development.The field of health communication and the use of evidence, in fact, have strong roots in the early applications of mass media and social marketing to programs for vaccines and oral rehydration therapy starting in the 1970s during the first Child Survival Revolution.A review of evidence of the effectiveness of 10 large-scale communication and behavior change programs for child survival conducted in eight developing countries in Africa, Asia, and Latin America between the late 1980s and early 1990s demonstrated substantial success in 9 of the 16 evaluated child survival-related outcomes (Hornik et al., 2002).This special issue continues this tradition of applying high standards of evidence to the review of health communication and behavior change programs.Global progress in reducing child deaths since 1990 has been significant.The estimated annual number of under-5 deaths fell from 12.6 million to 6.6 million between 1990 and 2012 (UNICEF, 2013).Of the 6.6 million under-5 deaths in 2012, most were from preventable causes such as pneumonia, diarrhea or malaria; around 44% occurred during the neonatal period (UNICEF, 2013).In 2012, the world recommitted to child survival with A Promise Renewed, a global movement to end preventable child deaths (http://www.apromiserenewed.org).A Promise Renewed brings together public, private, and civil society actors committed to advocacy and action for maternal, newborn, and child survival.