This thesis examines the wealth effects of corporate social responsibility. Specifically, it examines how socially responsible investment mutual funds compare to traditional investment funds, the reaction of capital market to corporate social responsibility, and whether the effects of being socially responsible is equal across firms globally. The results indicate that it is possible for a firm and investors to do well financially by being socially responsible however, this relation depends on the type of fund manager, the type of investor, and for a firm, it depends on social culture and government regulations of the society the firm is headquartered in.