I'll put it this way, Life to exist without a deity of some sort (I personally belive it is my Father in Heaven but I'll debate that some other time) is near impossible, for example, a species is now defined as a group of organisms that can succesfully breed and create fertile offspring in the wild, so if, let's say, a homo habilis once did evolve from a homo erectus, the chances of just one evolving is near zero, but since species cannot breed out of species then how would humans evolve and populate the earth?