No Need for “Force” of Gravity!
Einstein’s theory: The mass in a region determines the curvature of space-time.
Newton’s Theory: Force determines motion. For example, the gravitational attraction between the Sun and a planet determines the curved orbit of the planet about the Sun.
Einstein: It is not necessary to “solve” for the motion. All motion is along “straight lines” (geodesics) in a curved spacetime! The notion of gravitational “force” then has essentially been eliminated.
“Matter tells space how to curve and space tells matter how to move”. All is geometry!