The man of the third millenium inherits from modernity three unsolved problems: we can call them theoretical materialism, that means closure to transcendence; ethical nihilism, that means lack of values and points of reference; and economic liberism, that means wealth inequity factors. A fourth unsolved problem is the abstract character of the philosophy of modernity. A fifth unsolved problem is subjectivism, dating back to Protagoras, whereby man would be the measure of all things. How can we overcome such problems, beyond greek philosophy, beyond modernity?