Together with E.F.E. Douwes Dekker, he was a strong political proponent of association between Indo-Europeans and Indonesians in the colonial Dutch East Indies and early post-colonial Indonesia.
Bersama dengan E.F.E. Douwes Dekker, ia merupakan politisi kuat pendukung ikatan antara Indo-Eropa dan Indonesia di kolonial Hindia Belanda dan pada masa awal pasca kolonial Indonesia.