Subject: Has mankind bypassed natural selection?

As far as animals go, mankind seems pretty weak physically.  If people 
didn't have tools and inteligence we would be lower on the food chain.  
Has mankind perpetuated weakness within the species by figuring out how to 
treat problems with modern medicine ?  If there was ever a global 
catastrophe and most of the technology was lost, what kind of chance would 
mankind have of surviving as a whole?
Thanks for your thoughts,
Garrett

Re: Has mankind bypassed natural selection?