The second anime, Fullmetal Alchemist: Brotherhood, began production during the final chapters of the manga and faithfully adapted the source material all the way to the end.
His talent as a director, as a producer, as a writer of original screenplays, as a writer of adapted screenplays, as a leading actor, as a supporting actor.
If a population is perfectly adapted to a particular environment and has access to an abundance of resources, then there really is no reason to move or change.
Whether by changing locale, changing routine or modifying their surroundings, Americans adapted to their regional climates with a mix of creativity and common sense.