Examples from the Web for posterities
Ricardo of the Coxcombe would have some woman 'grave in paper' their 'matchless virtues to posterities.'Francis Beaumont: Dramatist|Charles Mills Gayley
The answer to this question is, that these different expressions of Moses were so ordered on account of the posterities.Commentary on Genesis, Vol. I|Martin Luther
Shakespeare's ghost has seen two or three posterities, beautifully at odds.A Book of Prefaces|H. L. Mencken
British Dictionary definitions for posterities
Word Origin for posterity
Word Origin and History for posterities
late 14c., from Old French posterité (14c.), from Latin posteritatem (nominative posteritas) "future, future time; after-generation, offspring;" literally "the condition of coming after," from posterus "coming after, subsequent," from post "after" (see post-). Old English words for this included æftercneoreso, framcynn.