Assumption

Contributions to milliongenerations.org should be based on the assumptions

that there is at least one civilization on planet earth in a billion years and

that it evolved from currently existing human civilization(s).

The assumptions about civilization should be reduced to the existence of an exchange of information between conscious individuals (both might indeed be very different than today, predictions should be avoided.)

The subjective perception of existence is assumed to be net positive.

Other assumptions may turn out to be necessary and are listed here.

Implicit assumptions should be declared.