This is the first volume that brings together the different strands in research on social and affective factors in home language maintenance and development, ranging from the micro-level (family language policies and practices), to the meso-level (community initiatives) and the macro-level (mainstream educational policies and their implementation). The volume showcases a wide distribution across contexts and populations explored. Contributors from around the world represent different research paradigms and perspectives, providing a rounded overview of the state-of-the-art in this flourishing field.