Evaluate the following argument from a Darwinian perspective?

No, you are not evolving.

Individual organisms do not evolve. No matter how long you live, even if it were a thousand years, you would never evolve.

It is only populations that evolve.

We probabl do evolve as the strict definition of evolution probably applies to us: The change in allele frequency from one generation to the next.

However, with modern medicines, food prodcution, our ability to manipulate the environemnt, it is very unlikely that we are subject to natural selection as we can overcome it.

Wrong. The human species is evolving. Individuals don't evolve.

For examples of recent evolution, there is adult tolerance for milk, tendency toward losing wisdom teeth, jaws shrinking, taller people (especially men), later menopause, lower cholesterol levels. Also larger heads and smaller hips. All these things take several generations to become significant.

false, Darwinian evolution does not happen at the individual organism level, the mechanism of Darwinian Evolution is mutations in the gametes, meaning the cells used for reproduction (the egg and sperm in humans), a grown organism does not add to Darwinian evolution because any mutations that happen in that organism outside of the gametes does not get passed on. gametes are mutating all of the time, the vast majority of these mutations are neither beneficial nor detrimental, we see the effects of detrimental mutations sometimes in babies that are born with birth defects, Evolution is pushed forward by those mutations in the gametes that would provide an advantage and hence have a greater chance of that organism passing it on to offspring 

As far as I can tell, man hasn't evolved for over 300,000 years.

We probably never did.  Not all hominids were human.