"Absolute centrality" refers to a situation or position of being extremely important or influential in a specific context. It implies being the key or central factor without any doubt or opposition. Full definition
A couple of quick observations: first, the «net gets mentioned every three or four pages as you'll see, demonstrating its absolute centrality to the Obama campaign (the index alone comes to roughly 2000 words!). (epolitics.com)
But despite the increasingly important role that assessment now plays in educational accountability and despite the absolute centrality of validity to educational assessment, much misunderstanding exists among educators regarding the nature of assessment validity. (ascd.org)
Replete with numerous images and a «portrait» of each artist based on her lock of hair, Portrait of an Artist proves the absolute centrality of women's practices to visual culture today.» (artefuse.com)