If God created all the good things around us then it means he created all EVIL too

[Asmodee]

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I don't think it's arrogance to say that our minds are better, even vastly better than those of our predecessors.  Actually, it's pretty easy to show that's true.
Take Pythagoras, for instance.  He is famous for figuring out how to calculate the distance of one side of a triangle if you know the other two sides.  In its day, this was monumental.  This wasn't common knowledge.  This was a big deal.  Today it's high school.  The greatest contribution of the day is common knowledge today.  That is a single example in many.  A person who figures it out for the first time, that is impressive.  But an entire society who just knows it and many thousands of other similar things is considerably more impressive.  I know what he figured out and literally thousands of other things he didn't know, and I'm not a genius.

Think of it in terms of computers.  Let's say you take a modern-day computer back, say, 3,000 years.  You show the people how to use it to do calculations quickly, but they have to come up with their own formulas.  At the same time you take a crappy computer from the 1960s and give it to physicists today.  The computer you have 3,000 years ago is far superior, but even so they will do less with it because they don't have the knowledge to even know where to start looking for knowledge.  Even if our brains were physically identical (they are certainly not worse) the knowledge they hold is vastly superior AND in much greater quantity so the conclusions they reach are vastly superior.  Add to that the fact that half the things they think they knew back then were actually wrong and the difference is even more pronounced.

I'm not saying ancient peoples were necessarily stupid.  There were some great minds in the past.  That is absolute fact.  However, the information they had to work with was riddled with superstitions, misconceptions and lack of understanding and there was no proven, structured process for discovery like there is today.  There were many, many incredibly complex, well thought out concepts of the past which were just wrong.  Given the information they had at the time, it was damned impressive.  The people who came up with the ideas were very intelligent.  But they still didn't come to accurate conclusions.  It's not there there was something wrong with their brains, there was something wrong with the knowledge they had to work with.

So I stand by my claim that ancient peoples are unlikely to have any "knowledge" which is very impressive today.  Yes, the idea that the Earth revolves around the Sun was a big damned deal that took a fine mind to figure out in its day.  But it's hardly a mind-blowing revelation to any first grader today.  Great mind, great discovery at the time, not something you'd be impressed by if it happened today.  What would you think of a man who approached you excitedly and showed you his measurements using ancient techniques and confided in you that he was pretty confident the Earth revolves around the Sun?  Would your fist thought be, "You're a genius!!!"  No.  You'd think, "Where have you been the last few hundred years?"