This is an integral research in business morality encompassing theology, philosophy, strategic management, quantitative finance and accounting. The worldview is from St. Thomas Aquinas, synthesized with Sorokin's paradigm, Lonergan's and Rahner's theories. The author integrates normative and descriptive streams of morality inquiry into one. The Common Good is the basis of business morality but Capitalism veils it partially for two centuries. It regains attention. By applying global banking industry's financial and philanthropic performance in two Nobel Laureates' quantitative theorems, the author demonstrates that practicing The Common Good gives strategic edge when stockholders' and stakeholders' interests are balanced. People with religions engage the counterfeit, not the real conscience, and living separate business lives i.e. The Separation Thesis. Both are evidenced. The Magisterium rejects various philosophies when they contravene faith. Such rejection is supported empirically. This research emulates Scholastic research which, with current knowledge, methodology and technology, is possible again. Truth is unitary and transcends space, boundaries and time. Ad Gloriam Dei.