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Interstellar relations is a speculative-fiction category focused on the diplomatic, political, legal and cultural interactions that arise when multiple spacefaring species or human polities meet and coexist. Stories in this genre explore first contact and ongoing contact scenarios—embassies and negotiation chambers, trade and treaty-making, espionage and power struggles, cross-species romance and social integration—as well as the ethical, linguistic and scientific challenges of understanding alien minds and customs. Emphasizing ideas about governance, law, economics and identity on an interstellar scale, the genre can read as political thriller, courtroom drama, social science fiction or character-driven human/alien drama, and often examines how communication, misunderstanding and empathy shape the fate of civilizations.

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