Assertion: soft science fiction | /r/HasProperty | based on softsciences
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text: Hard science fiction is based on engineering or the "hard" sciences (for example, physics, astronomy, or chemistry), whereas soft science fiction is based on the "soft" sciences, and especially the social sciences (anthropology, sociology, psychology, political science, and so on).
text: George S. Elrick, in Science Fiction Handbook for Readers and Writers (1978), cited Brian Aldiss' 1959 short story collection The Canopy of Time (using the US title Galaxies Like Grains of Sand) as an example of soft science fiction based on the soft sciences.