With a background in history, architecture, and urban studies, his research revolves around material culture, domestic life, and sustainability, particularly focusing on the dynamic nature of objects and places. Under this framework, his publications address diverse topics such as the shaping of affects towards objects, their material, symbolic and spatial trajectories, or the definition of boundaries between subjects and objects. Errázuriz is a co-founder and active member of "Cosas Maravillosas" (Wonderful Things), a collective dedicated to promoting sustainable living through the research, recognition, and care of our everyday environments. He also serves as the editor-in-chief of the Green Handbook, a compendium of recommendations for reducing household consumption and leading a more sustainable lifestyle using existing resources. Furthermore, Tomás directs Bifurcaciones, a publishing house dedicated to urban cultural studies