This guide deals with social economy and its impact on teh society. Social democracy seeks to achieve a successful and social economy at the same time. Moreover, the environment can not be harmed. For this reason, the State must establish smart rules that define the framework of the economy. So this guide tries to find answers on what are the ideas on which economic policy should be based, as well as, how does this economic policy differ from other policies. What answers do social democracy give to future challenges?