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Body, Mind, and Spirit...
These are the three main components that make up living beings and are the aspects that need to be improved and elevated to achieve Life Evolution.
Prime Earth had no idea what Life Evolution is, but it does have a way to elevate a person's strength, the goal of which is to, of course, eliminate demonic threats.
Compared to the combined effort of the entire alliance's research about gaining real strength, Prime Earth wouldn't even reach the standards.
The Six Leading Races, as well as the countless other races and clans that joined the alliance, delegated a mind-blowing amount of brainpower in pursuit of Life Evolution. The true goal of pursuing Life Evolution still escapes Cedric, but it isn't that important to him now.