In developed countries many families live in poverty and other vulnerable conditions, having low quality of life and suffering from social exclusion. This constitutes a major social, political and citizenship concern, which stresses the reformulation and rethinking of the support and actions towards improving these families quality of life in all levels: macro - national and international policies; meso -- institutions organisation and support programs; micro - communities, professionals and citizens. This book focus mainly on the micro level, especially highlighting research and practice guidelines for social and community interventions which have shown to be effective in strengthening these families.