‘Being’ is at the heart of Classical Logic.
Aristotle and the Lyceum philosophers proposed ten categories among which Substance was ontologically primary. In other words, Substance is; and the world with its million features revolved around it.
The idea had been around awhile. In the first elements, Earth, Air, Fire, Water, and Space [or ‘Sky’], a list found in most early literate cultures, Earth [Prithvi] was the primary substance, the grounding element.
Get to ‘Substance’ and you get to the heart of the matter. It was the locus to which all attributes attach. ‘Matter’ remained unchanged as ‘Form’ evolved from Acorn to Oak, from Embryo to Man, in natural teleological fulfillment.
The material world matched the propositions of the propounded Logic. And Aristotle’s Logic in turn reflected the lines and contours of the propounded, modeled material world.