Forum:Is the Fire Emblem universe all on one world or does the FE serie's span across diffrent world's, parallel or alternate reality's?

well, ive recently gotten into the fire emblem gaming and lore and ive noticed something, i think all of the fire emblem game's reside on the same world that thier respective story's take place on. there are a few contridictions to this theory though as in game's like FE: Shadow Dragon and awakening have diffrent race's, god's and history that are not related to the game's like FE: path of radiance or radiant dawn (i think it was called that.) but this thoery of FE: PoR/RD and FE:SD/ Awakening bieng on diffrent world is also contradicted due to the fact that one of the paralouge's in FE: Awakening allows you to recruit a descendent of Ike named paris. he come's with ike's weapon as well so this further prove's the theory that all the FE games are all on the same plane of existance. my only question is how come there are diffrent god's that nobody has thought they were interconected to each other in some way yet. half of the god's that exist in the world sealed away or something like that while the other half live on another plane that co-exists with the real world. someone please help my clarify the lore of fire emblem so my brain doesnt exploude from overthinking this.