Plural of futurity; multiple future times, possibilities, or states; the collective potential of what is to come.
From futurity (which comes from future + -ity suffix for nouns) plus -ies plural form.
Futurity and futurities are beautiful old legal and philosophical terms—in law, 'future interests' and 'futurities' mean property rights that will only activate later, showing how English developed specialized vocabulary for talking about ownership through time.
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