From a quick read of this thread, I gotta ask: what’s your goal in starting and posting to this thread? If you believe everything you say and are satisfied with it, why call for the opinions of others? If your goal was to convince others, then you need a lot more work on your interpersonal skills. You’ll convince no-one (or at least no-one worthwhile) by implying that disagreement with you equals stupidity.
My own take, by the way, is that humans haven’t significantly evolved in any meaningful way for the 10,000 years or so we’ve been building civilization (such a span is a mere blip on the evolutionary scale). We haven’t evolved to become smarter, but we have identified a lot of things that were making us dumber (i.e. pollutants, certain childhood diseases) and tried to minimize our exposure. Also, instant communications and data storage means that an intelligent person has access to the research of other intelligent people. Heck, even a dumb person who can read can accomplish all kinds of cool things undreamt of prior to the 20th century.
So, in short, I don’t understand your concerns.