Banpu's 15-year Banpu Champions for Change (BC4C) program, supporting 130+ social enterprises, reveals three key lessons: sustainable competitive advantage comes from the value created for people rather than innovation alone; deep problem understanding cannot be replaced by AI or big data; and team learning capability is more critical than perfect contingency plans. The initiative has positively impacted 1.3+ million people by shifting Banpu's role from financial backer to ecosystem builder.