Life is based upon death. Only the most primitive species exist without reliance on other species as a food source.

Cyanobacteria, a type of phytoplankton, consume mineral macro nutrients and carbon dioxide, releasing oxygen through photosynthesis.

Krill, shrimp-like invertebrates, consume phytoplankton and directly feed advanced forms of life such as whales and seals. Krill are fished commercially for human consumption.

Krill are firmly in the Culture of Death, depending on phytoplankton for sustenance. I do not know of a more direct connection between truly primitive life and advanced life. The chain from cyanobacteria to phytoplankton to whales and humans (advanced mammals) is only three species in length.

The Culture of Death is the realization that almost every living species is dependent on other species as a source of food or energy. All but the most basic forms of life are rooted in the Culture of Death.

You live on the dead carcasses of the plants and animals that you consume. The pyramid of life that had to occur for you to exist is a never ending tower of life that had to die to further the chain of life itself.

Life feeds upon life.