essentiality

The White House, however, does not grapple with the essentiality of good ground forces now.
There’s Only One Way to Beat ISIS: Work With Assad and Iran|Leslie H. Gelb|October 18, 2014|DAILY BEAST
You are made to feel the non-essentiality of the stress of the flesh in the true places of spiritual existence.
Adventures in the Arts|Marsden Hartley
Clean boots are an essentiality of society; why should I shrink from the responsibility of helping to produce them?
She and I, Volume 2|John Conroy Hutcheson
Mr Williams work has a splendid detachment and a splendid essentiality.
Life in a Railway Factory|Alfred Williams

Difference is their charactertheir essentialityjust as no-difference was the essentiality of their source.
Eureka:|Edgar A. Poe
Its essentiality to a knowledge of the political history of the times must be apparent to all who read it.
Abridgment of the Debates of Congress, from 1789 to 1856, Vol. II (of 16)|Thomas Hart Benton

Origin of essentiality