This introduction frames culture not merely as a backdrop to human behavior, but as a fundamental, albeit often invisible, medium through which reality is constructed and negotiated. Departing from the traditional Brundtland definition, the text argues that true sustainable development requires a meaningful equilibrium across four dimensions: social, economic, environmental, and cultural. This work presents an interdisciplinary examination of the diverse ways culture influences sustainability, challenging the exclusion of the cultural dimension in development policies. The introduction establishes a framework where culture is a principal actor in the ecological crisis and a necessary pillar for sustainable development. It outlines a series of chapters that offer a kaleidoscopic view of this relationship through a wide array of case studies. Topics range from a critique of neoliberal impact metrics in the UK cultural sector to the integration of sustainability in heritage conservation, the cultural implications of technological ecosystems, and the design of cultural services in rural areas, along with other diverse investigations into fields such as retail environments, art, and exhibition design. Through these varied contributions, the text argues against a single definition of cultural impact. Instead, it advocates for a continuous, multifaceted debate that renders culture’s contribution to social cohesion and economic resilience visible to policymakers and society.