Book excerpt: How does the media influence our everyday lives? In which ways do our social worlds change when they interact with media? And what are the consequences for theorizing media and communication? Starting with questions like these, Mediatized Worlds discusses the transformation of our lives by their increasing mediatization. The chapters cover topics such as rethinking mediatization, mediatized communities, the mediatization of private lives and of organizational contexts, and the future perspective for mediatization research. The empirical studies offer new access to questions of mediatization an access that grounds mediatization in life-world and social-world perspectives.