This book explores the nature and type of prevalent collective behavior that influences women empowerment, women workforce participation and behavior change in sanitation. The influence of collective norms and customs have been investigated through a series of studies throughout India. There are very few research works on understanding social norms that distinguishes it from a range of other collective behaviors. This understanding would not only improve analytical clarity on collective behavior in general and social norms in particular, in the context of gender and sanitation, but also improve development practice in these areas. This book is also novel as it would expound the social network in the context of sanitation behavior in India. The tools and techniques discussed in the book are replicable and hence would be helpful for other researchers and development practitioners to analyse other collective behaviours.