The Future of Human Evolution

Evolutionary development is sometimes thought of as exhibiting an inexorable trend towards higher, more complex, and normatively worthwhile forms of life. This paper explores some dystopian scenarios where freewheeling evolutionary developments, while continuing to produce complex and intelligent forms of organization, lead to the gradual elimination of all forms of being that we care about. We then consider how such catastrophic outcomes could be avoided and argue that under certain conditions the only possible remedy would be a globally coordinated policy to control human evolution by modifying the fitness function of future intelligent life forms. 1. The Panglossian view Can we trust evolutionary development to take our species in broadly desirable directions? Starting from primitive, unconscious life, biological evolution has led to the development of ever more advanced organisms, including creatures that have minds, consciousness, language, and reason. More recently, cultural and technological development, which exhibit some parallels with biological evolution, have enabled our species to progress at a vastly accelerated pace. The past few hundred years have seen enormous improvements in human life‐span, labor productivity, scientific knowledge, and social and political organization, which have enabled billions of people to enjoy unprecedented opportunities for enjoyment and personal development. On a historical as well as on a geological timescale, the big picture shows an overarching trend towards increasing levels of complexity, knowledge, 1