Biome: the epitome of an ecological environment, a biological community, a broad platonic ideal, perhaps the venue of a god (or a supernatural instigator).

The evolution of a life organism isn't about individuals, but groups, and communities of interacting groups, that together enable mutual survival.

Life starts as a small dream, evolves in small steps, becoming a bigger dream, gradually realizing more and more of its potential. It is a story that starts with an idea, that leads to another idea, and many more that all meld together into a combined dream.

The life of the universe is All, existing through time. It includes the life of not only biological entities, but all entities of any type or size. Starting with the smallest subatomic entity. 

The universe, then, is the sum of all the entities which comprise it. The history of the universe is simply the sum of the histories of all its entities, all their combinings, and all their resulting biomes.

A history is not something that is dead and gone. It is the enduring entanglements that link eternal events together. 

The Big Dream is the infinity of the possible. The small dreams are  actualizations of the possible, made real by linking possible events into possible sequences. The infinity of possible events is a first order infinity, a countable infinity. The infinity of actual sequences of events is a second order infinity, uncountable in the normal sense because of the endless possible branchings and recombinings of different events into new sequences. 

In the end, Stephen Hawking realized that the top down Big Dream of the Multiverse was not very useful in explaining our experienced existence. It is the small dreams that count, that define the world of our experience. The worm's-eye view, from the bottom up. Realistically, this is all we can do. And every atom does it!

Hawking found a simplifying way to describe a universe. It's to picture it as a hologram, which projects all of the seeming substance of the universe's volume from a surrounding surface shell. Perhaps this shell is the idea realm where our abstract nature resides, and what we call reality is our projection from that viewpoint.

Hawking's final book, The Origin of Time, says it far better than I can.