Standard quantum mechanics without observers

The Projection Postulate from Standard Quantum Mechanics relies fundamentally on measurements. But measurements implicitly suggest the existence of anthropocentric notions like measuring devices, which should rather emerge theory. This article proposes an alternative formulation Mechanics, in is replaced with a version and observations are not assumed as fundamental. More precisely, Wigner functions representing quantum states phase space required to be tightly constrained regions classical coarse graining space. ensures that quasiclassical at macrolevel. Within coarse-graining region, time evolution system obey Liouville-von Neumann equation, phase-space equivalent Schr\"odinger equation. projection postulated happen when transitions region others, by selecting one them according Born rule, but without reference connection standard explained, well problems present solves, particular Wigner's friend type paradoxes. Experimental consequences open proposed discussed.