Ellen Key 18491926 was one of Europes most influential thinkers on issues of motherhood and womens sexuality during the early 1900s. This anthology maps how her ideas were reformulated in Europes five major language areas English German French Italian and Spanish and explores how her ideas about social modernity and womens sexuality were received and how they were communicated in feminist literature and debate during the first decades of the 20th century. The aim of this anthology is to offer new knowledge about Keys influence on European thinking on issues such as motherhood sexuality and love in the early 1900s by offering both a broader and deeper understanding of the international significance of Keys work.