The singularity literature perhaps does a service by highlighting the ways in which AI developments could produce new degrees of intelligence and operational autonomy in AI agents—especially as current AI agents play an increasingly important role in the design of future AI agents. Bearing in mind the far-reaching implications of such possible future scenarios, the urgency of work in [machine ethics] to ensure the emergence of ‘friendly AI’ (Yudkowsky 2001, 2008) is all the more important to underline.

Steve Torrance (2012)