Visionaries pushing some form of utopia are defined by their pessimism. Their belief that utopia can be achieved means they don’t believe things could ever get better, nor their idea of what is best. Unless new knowledge stops being created and all relevant knowledge is known, utopians exhibit the same parochial error as someone who believes the sun revolves around the Earth.
See also:
- From The Beginning of Infinity
- Utopians are also cynics because they assume nothing will change when they achieve their vision