Mathias travels extensively for work, research and pleasure and has been to more than sixty countries.
With Jr Cameroonian PhilosophersYaounde, Cameroon
Once upon a timein Greece
Philosophers sometimes are skeptical onlookers
MPP Ethics ClassAt the Kennedy School
Discussing with German Minister of Education Anja Karliczek, June 2018
With Bryan Stevenson, Meredith Rosenthal and Robert Livingston