Since first action at Big Bang the universe is determined by spacetime-vacuumstructures, not by matter. Material atomic structures of hydrogen molecules or other chemical elements or particles like quarks, gluons and leptons only deviate from the basic, important concepts of nature: spacetime. This concept is an energy-structure, which lies at the base of all existing objects and interactions which are described over matter structure. So this description via General Relativity nowadays leads to the thinking of underlying spacetime-structure as the real thing, which describes the important forces of universe in first line. The existence of matter floating on space-time only distracts from the true basic description of the real world and feigns importance where only irritation exists. Natural philosophers like Cosmologists and spacetime physicists should therefore concentrate on the fundamentals that a vacuum structure of space-time provides for the explanation of the existence of the universe and refrain from and abstract from considerations of matter. This situation may lead to a better understanding of the basic structures of a quantum-gravity.