In 1938, a year after the retirement of Deterding as chief executive, Royal Dutch Shell had joined a consortium called Catalytic Research Associates (C.R.A.). IG Farben was also a member of that consortium. IG Farben used forced labor and held the patent on Zyklon-B gas used during the Holocaust to exterminate millions of people, including children.
This website and sisters royaldutchshellgroup.com, shellnazihistory.com, royaldutchshell.website, johndonovan.website, and shellnews.net, are owned by John Donovan. There is also a Wikipedia segment.