1) Organisms evolve.
2) All organisms are free to act, think, live, and believe as they desire. We recognize equality and that while thoughts and beliefs may never agree, all life has equal value.
3) Every organism is responsible for its own actions.
4) Every organism is responsible for its own survival and self-preservation insofar as to preserve its species, and higher sentient organisms are responsible for lower sentient and non-sentient organisms.
5) We live in an old, cold universe that doesn't give a damn about any one of us.