That's a good question. I can imagine that there was a time before there was life on Earth, and then clearly there was a time X-hundred thousand years or a million years later when there were things that we would all recognize as biological.
What Causes High White Blood Cell Counts? White blood cell counts are elevated when the body is fighting an illness or disease, so a high count is indicative of an infection. Often, your doctor will order another round of tests after he or she determines you have a high white blood cell count.
A bone marrow disorder is a less common, more serious cause of elevated white blood cells. Leukemia is the most frequent culprit. With this type of cancer, the bone marrow produces large numbers of defective white blood cells and releases them into the blood. Other bone marrow disorders, such as polycythemia vera, can also increase the WBC count.