1. In the years preceding 1492, there was a time when, if a 'poll' could be taken on how many people thought the earth was flat, the majority would have agreed,
2. In the end (as in the end of our individual lives), the question of evolution or divine intervention will be answered. Those that believe in intervention, will be satisfied with the answer. Those that believe in evolution....well, I think they're not gonna like the answer.
For me, I really don't care about evolution or divine intervention as a point of question. For all I know, the 6 days talked about in the Bible could be a metaphor for eons, and God's intervention might well have taken the route of evolving. From my perspective, proponents of evolution are really an undercurrent of those in this country that live and breathe to control our lives, thoughts, and destiny. When accessition is given on evolution vs. intervention, then 'they' will start on their next little bit of slow steady destruction of religion, the family and freedom.
Actually, that's not the case.
The ancient Greeks (starting at least with Pythagoras, 6 centuries before Christ) had worked out the earth had to be a sphere (using scientific principles), by the time of Pliny (1st century AD) the notion was generally accepted, including by most of the church fathers, such as Augustine, and many later clerics (such as the Venerable Bede).
The only real doubters were a minority of early Christian authors (St. Cyril of Jerusalem, St. John Chrysostom, Diodorus of Tarsus and a few others) arguing for a 'flat earth' on purely Scriptural grounds. The Church occasionally produced further proclamations in favour of a 'flat earth' (such as Bishop Vergilius), but by the 8th century AD, the matter was more or less settled, at least among the learned.--and probably the general populace as well. Our ancestors may have had less education than we boast, but they were surely far more observant of the changes of the seasons and the events of the night sky; and you can't make much sense out of even casual astronomy assuming a 'flat earth.'
It's a modern myth that prior to Columbus folks thought the earth was flat. That was a poetic myth created by Washington Irving, who wrote a popular book portraying Colombus in heroic light. Now, of course, we know that Colombus was pretty unsavoury, but that is beside the point.
Now, none of the above takes anything away from the intent (as I read it) of your first point in your posting: scientific 'truth' is not determined by opinion polls. It is determined by doing science.