In 2000–2001, Daum was a fellow at the
Weatherhead Center for International Affairs at
Harvard University. In the summer of 2001, Daum wrote an article for the
Harvard International Review entitled “
Universalism and the West — An Agenda for Understanding”, in which he criticised the US government for destroying the
Al-Shifa pharmaceutical factory in
Khartoum during the 1998 bombing campaign, codenamed
Operation Infinite Reach. Having worked in Sudan as ambassador of Germany during the time of the attack, he wrote that there was no evidence that the factory had produced precursors to
chemical weapons and that Ghazi Sulayman, an internationally respected
Sudanese human rights advocate, was a credible witness to this. Furthermore, Daum claimed that the attack caused a serious shortage in medication and that a "reasonable guess" for the deaths of civilians in Sudan caused by this shortage was in the "tens of thousands". This claim was described as "hard to take seriously" and implausible by historian
Keith Windschuttle. In 1999, the Museum für Völkerkunde, now
Museum Fünf Kontinente, (Museum of Ethnography) in Munich, Germany, published Daum's comprehensive catalogue for its exhibition on the cultural
history of Yemen. Apart from this, Daum is the author of several other books and articles on the cultural history of Albania, Sudan or Yemen, with a special interest in the
pre-Islamic history of Yemen. ==Death==