Tesla claimed to have developed his own physical principle regarding matter and energy that he started working on in 1892 and in 1937, at age 81, claimed in a letter to have completed a "dynamic theory of gravity" that "[would] put an end to idle speculations and false conceptions, as that of curved space"
This theory is based on the work and ideas of Tesla although the main manuscript is lost many of his ideas and concepts on a gravitational theory can still be found. This video gives us an objective understanding of the electromagnetic force explaining gravity as a secondary force to the EM force (Tesla dynamic theory of gravity). In this theory electrical potential, gravitational potential and human potential are all linked by one universal process! Also curved space is never empty because electric charge is an innate part of matter, there is always electromagnetic fields.
"There is nothing endowed with life—from man, who is enslaving the elements, to the nimblest creature—in all this world that does not sway in its turn.
Whenever action is born from force, no matter how small it is the cosmic balance is upset and the universal motion results".