A computer-implemented method is provided for selecting a recommended investment portfolio based in part on socially responsible considerations. A portfolio of securities is identified for potential inclusion in the recommended investment portfolio. Socially responsible investing (SRI) scores are provided for the identified securities, and the identified securities are ranked relative to each other based on their SRI scores in a computerized ranking engine. A processor receives an entry of initial weightings for each of the identified securities, or data by which initial weightings for each of the identified securities can be objectively calculated; the ranking of the identified securities based on their SRI scores; and an SRI multiplier algorithm that is correlated with the relative ranking. The initial weightings or the data are unadjusted by socially responsible considerations. The processor uses a weighting calculation engine to calculate adjusted weightings for the portfolio of securities using at least the entered items. Securities having higher ranked SRI scores relative to other securities receive greater weightings, and the weightings include non-binary weightings. The processor outputs the adjusted weightings for the portfolio of securities. The adjusted weightings are used to select the recommended investment portfolio based in part on socially responsible considerations. The recommended investment portfolio may also be used to manage an investment company that selects securities based in part on environmental impact considerations.