Part 5/8:
Transitioning to a type four civilization means mastering energy resources across the universe. Humanity would manipulate galaxies with god-like powers, shaping entire systems at will. The notion of biological limitations fades, possibly allowing humans to achieve immortality or transmute into energy forms.
At this stage, civilizations could expand their reach beyond the observable universe into realms rich with dark energy. The mastery of such power might lead to the creation of new life forms and technologies previously confined to science fiction.