This paper proposes Proof of Love (PoL) as a new ethical and governance consensus for the age of AI and Web3. It argues that love—understood as empathy, reciprocity, and creative cooperation—is the missing principle in current technological civilization. By integrating blockchain governance, decentralized incentives, and ethical philosophy, the study outlines how PoL can serve as a foundation for a new “Love-based Civilization,” where human and AI co-govern through shared value creation. The work bridges philosophy, economics, and systems design, aiming to redefine the meaning of intelligence, governance, and civilization itself.