This book studies the international investment law regime in Africa and provides a comprehensive analysis of the current treaty practices in Africa from global, regional and domestic perspectives. It develops a public interest regulation theory to highlight the role of investment regulation in sustainable development and the protection of human rights. In doing so, the book identifies seven factors that should be considered by arbitrators in resolving international investment disputes that affect the public interest. It considers how corporations can be held accountable through investment treaties in the absence of a global treaty on business and human rights while protecting the rights of investors and their investments. Furthermore, the book explores the current objectives and features of investor-state dispute settlement (ISDS) as well as the deficiencies and its intersection with the rule of law. It identifies alternatives for ISDS and the extent to which these alternatives address the objectives of attracting investment, depoliticise investment disputes, promote the rule of law and offer remedies to investors. These solutions are offered in relation to the protection of human rights, the promotion of sustainable development and the right of states to introduce domestic public interest regulation. Finally, the book takes a prospective stance and discusses future trends for dispute settlement and investment rulemaking in Africa.