Evolution is a universally accepted fact.
Evolution is a fact, like the fact that apples fall downwards from
trees. "Almost everyones's guide to Science" J. Gribbon, Pg 124.
I note for the record that the fact of evolution is universally
recognized by all except a tiny minority of fringe dissenters.
By "fact of evolution" I am not referring to "microevolution", or
to biogenesis, or to any form of strict materialism.
I mean that it is accepted as fact that life has been around on
Earth for billions of years, that it has changed in form over that
time, and that the changes are cummulative in diverging lineages.
His(J. Gribbon) offer of proof to the doubting Thomases is in the form of the micro evolution of finch beaks (pg 128). Furthermore on pg 129 he argues that even among scientist (non biologists) many fail to comprehend how evolution works and cites antibiotic resistance. So he
argues from the observable and testable and extrapolates from micro evolution that by implication as the proof of macro evolution, also as the micro composes the macro which is only logical and no other way towards the phenomenon of macro existence. Macro also merely denotes a larger scale than the micro, but micro and macro is exactly the same in behaviour and existential properties. In short, macro is just the micro magnified.
Macroevolution,
if the term is used at all, refers to substantial changes in entire
populations, at the level of species or above. Macroevolution is thus
the fundamental fact, recognized well before the time of Darwin.
The problem for science in the nineteenth century was to identify
the processes and mechanisms by which change occurs. This is where
Darwin deserves credit for the first steps towards a viable theory.
Microevolution is basically the theory -- the study of processes
by which change arises and accumulates in populations.