A Transdisciplinary Perspective on the Sustainability of Portuguese Social Security

The sustainability of social security, including the Portuguese, is a complex social problem of contemporary society that requires an integrated and transdisciplinary study of several sectors of society, particularly child support, late births in adult population, increase in life expectancy of the elderly, and immigrants, among others.This paper sought to give a transdisciplinary (TD) approach to the sustainability challenges of Portuguese social security through the Interpretive Structural Modeling (ISM) method.This might ensure a dignified retirement for the current elderly and future generations both Portuguese and immigrants.