I was always under the assumption that the Entity was the planet itself (inanimate objects can have souls within them in CT/CC, just look at Masamune) and that the entire saga of CT/CC was the Planet vs. Lavos, with the people on the planet caught in the middle.
The Planet and Lavos are two organisms that are fighting for survival.
Here, here, fellow n00b. Once i was finally able to wrap my head around the events in Chrono Cross, I came to the same conclusion.
The Entity, whom I believe to be the Planet, and Lavos are two greater than human (though I stop short of calling the 'gods') playing a calculated game of winner take all (and I mean
ALL) chess.
Allow me to elaborate, using the terminology found here in the Compendium:
The Reptite Timeline: The Entity sets its pieces on the board
The Lavos Timeline: Lavos sets his pieces upon the board. The Entity is placed in Check.
Keystone T-1 Timeline: After some careful re-organizing, and turning a few pawns into queens (so to speak) Lavos is now placed in Check.
Keystone T-2 Timeline: The events of The Dipolis War flood the game board with more pieces for Lavos. The Planet is in check again, and all seems lost.
Mid-Dimension Timelines: Belthasar's tampering to set up Project Kid gives the Entity more pieces to play with. Here is where my theory falls apart though, since this was not the will of the Entity (or was it?) Home and Another World Split. The game is in stalemate.
Home/Another World (aka: the events of Chrono Cross): After a series of zany adventures the Chrono Cross is made, and the Time Devourer is denied existence. CheckMATE, motherf_cker!
But one has to wonder, why did the Entity go through all that, just to leave the Progeny of Lavos in charge? Does it have a choice in the matter? And if so, would the next logical step be getting rid of humans, in favor of demi-humans, dwarfs, fairies and so forth? Hmmmmm….