'White Finches evolved to be Black' : is ANY of this true ?

Well 'finches' are 'finches' - we'll let that semi-accurate layperson definition stand, for the sake of argument.

But did all the white finches, as gradually as Darwin claimed they must, all turn into black finches ?

But might it really be that most finches used to white and now - currently and only here and not there - most are black ?

What some call the handicapped , the deviant, the defective and the degenerate ---- they are the mutations found - all the time - in every species.

And it is their and their other cousins' relative reproductive success over time and place - expressed in statistical percentage, not in discrete individuals - that actually evolves.

Bacteria with additional cell machinery that makes them resistant to naturally produced antibiotics (antibiotics already out there in the environment on occasion) are usually slower to reproduce compared to their cousins without this extra machinery.

Simply put, it might take two minutes longer to make all that additional equipment compared to bacteria doing without it.

In lush circumstances (a massive human infection, let us say) , a bacteria population doubling in numbers every 20 minutes quickly outpaces those doubling every 22 minutes.

In the 1940s, bacteriologists expressed this fact of life by frequently noted that 'drugfast' bacteria (those resistant to this or that natural antibiotic) were usually less virulent than the traditional killers who lacked this resistance.

These drugfast bacteria did not evolve in response to the new presence of natural antibiotics in the human bloodstream but were already existing sub strains of bacterial species, albeit found in very small numbers within humans.

They were not accepted as normal variants but seen as the despised handicapped and defective, like R bacteria and SBEs, et al.

Seen as such in the Modernity worldview that respected bacteria only to the extent they were virulent killers of humans.

Of course today, we worry about them and respect and fear them as MRSA bacterial killers , while we now regard their older cousins (hard to find these days) with scorn because they die so readily before the antibiotics.

We killed one sub strain of a bacteria species only to see their lesser cousins suddenly coming on strong.

So one reason why there are 500,000 species of beetles around is because variety and diversity is the best possible assurance that at least some of a species, family or genus will likely survive even the worst catastrophe to hit the globe ....