Subject-Object duality is a vestige of our predatory nature: a life-form eyes (sees) another life-form; zooms in, focuses, attends... to see if this other life-form is fit to eat; subject-object duality is born: "I" want "it."
To attend is to objectify. To objectify is to distill yourself into a stand-alone self out of the oneness of what surrounds you. Immersed, at a baseline, in the indistinguishable oneness around us we pop out of this anonymity of mindlessness as soon as we begin to track and hunt patterns.
We are first and foremost informational hunter-gatherers.