This thesis attempts to resolve the deadlock to achieve an equitable division of taxes, and thereby internation equity. As the present tax laws were not negotiated, it is not considered here as fair. In this thesis it is proposed that an equitable division could be achieved through a division based on the levels of human development (combining Rawlsian schema and Sen's capability approach). Therefore, it is argued that such a division would be equitable; because it would be based on entitlements (territorial claims), it would generate cooperation and thereby lead to greater efficiency. Importantly, this thesis establishes that the present tax treaties neither generate cooperation nor cohere with global welfare. Similarly, it is also found that the other institutions (OECD, IMF, WB and Dispute Settlement) related the tax regime presently do not promote development based on human capabilities. This could help developing countries to pursue a division favouring development (laws favouring development) and understand the institutions better suited to pursue such goals.