Most successful creature on earth.

i love rats, they are very sweet and smart. Unfortunatley they in many cases where destroyed by people. They became agressive because they lerned that peopel can't be trusted and that peopel will try to harm them. They are not the most successful, but then i don't thing anything is the most, we are all relative to another creatures. Rats might be good at one thing but not at the other, much like other animals including humans

No i don't think that they are the most successful creature on the earth as i believe there are lots of flaws in any creature or being in the world , nothing is so called prefect .There is always someone better.