Social capital is posited as a critical resource within the "social commons," with a role in fostering trust, cooperation, and societal resilience. Drawing from the Bahá'í Faith's principles of unity and the oneness of humankind, it highlights how Bahá'í community-building efforts—through transformation of individuals, communities, and institutions—can regenerate social capital. The Bahá'í framework offers unique insights into restoring trust and cohesion by addressing systemic inequities and promoting collective well-being. Through the lens of Social Affinity Flow Theory (SAFT), this talk connects spiritual and material dimensions of social capital to sustainable development and governance.