His discoveries and studies of hominid fossils in Java and his studies of other important fossils of south-eastern Asia firmly established his reputation as one of the leading figures of 20th Century paleo-anthropology.
Penemuannya dan penelitiannya mengenai fosil manusia purba di Jawa dan penelitiannya mengenai fosil penting lainnya di Asia Tenggara memberinya reputasi sebagai salah satu figur paleoantropologi terpenting abad ke-20.