Hi Sriram,
I don't see it in your terms at all. If you want to use the word 'higher' to simply mean 'more complex' or even 'better fitted to survive' I have no objection at all. However I have no reason or evidence to think that *spiritual evolution(whatever that may mean) guides and directs physical evolution. Also, as plenty of species have developed certain abilities to a much greater extent than humans, the idea that this is a PC stance is rather ludicrous in my case.
*unless you mean that the physical development of the brain can aid survival, and, hence, through the process of evolution, can produce other physical effects which can also aid survival.