Parallel Histories

Future histories were not written to be read in parallel but can be. Larry Niven's kzinti are, under different aspects, comparable to:

Wells' Martians;

Anderson's Merseians, Ythrians and Imperial Terrans;

Stirling's Draka.

Slavery in different forms is common to these six cultures. Kzinti and Ythrians are intelligent carnivorous hunters, motivated by blood odors in their warships. Kzinti enslave human beings and eat some whereas the Martians would have enslaved human beings and drained the blood from some. Kzinti and Draka plan to spend generations taming enslaved populations. Merseians and kzinti are aggressive interstellar imperialists.

We can imagine a narrative in which these timelines are discussed in the Old Phoenix and another in which characters in a quantum ship jump between timelines trying to influence the outcomes of space battles described in the various future histories.