For the first half of geological time our ancestors were bacteria. Most creatures still are bacteria and each one of our trillions of cells is a colony of bacteria.

Geological change usually takes thousands of years to happen but we are seeing the climate changing not just in our lifetimes but also year by year.

From year to year environmental changes are incremental and often barely register in our lives but from evolutionary or geological perspectives what is happening is explosive change.

Civilization exists by geological consent subject to change without notice.