Warning: graphic footage.
The Warsaw Ghetto was a Nazi experiment in the use of Lethal Neglect as a means of execution.
Most of the footage in the films we have of the Warsaw Ghetto was shot by the Nazis who sought to document the day-to-day decline in the health of residents walled off from the rest of the community.
Lethal Selection (or Neglect) as a means of execution as an American idea, first proposed by Paul Popenoe and Roswell Hill Johnson in the 1918 handbook, Applied Eugenics.
Nobel Prize Winner, Alexis Carrel, wanted to execute or sterilize those he deemed unworthy:
For further reading see: Lethal Neglect: American Eugenics in the 21st Century