PMFJI to your conversation with Orion, but the phrase "origin of new species" refers to how a species came into existence, not to the overall origin of life itself.
Each species out there split off from a parent species thru one or more evolutionary methods - basically either sympatric or allopatric speciation. There's always much argument over whether a specific species separated from the other mostly because of natural selection or gene drift. But for species for whom there's a lot of data, it's obvious that it was because of evolution.
Agreed. But evolutionary theory goes further - it claims to explain how ALL life, species, etc., came to be.
So I ask again, how did LIFE begin?