There is no evidence in biology (as of yet) that evolution tends towards human-like intelligence. There have been complex life forms on Earth for hundreds of millions of years now, but humans are the first and only species to begin approaching a Kardashev Type I civilization -- and we're still less than 75% of the way there.
Looking at it purely statistically, that gives you 1 intelligent species out of about a billion over our planet's history.
Another really neat way to look at it is in terms of time. If you were to choose any random moment in Earth's history up til now, what are the chances that you would find anything resembling an industrial civilization? About 1 in 20,000,000. Which is to say, as a first-order approximation, we might need to closely examine 20 million extrasolar Earth-like planets before we find one with evidence of a civilization like our own.
The latest anthropological research is finding ways to measure the intelligence of our prehistoric ancestors through the size of their carotid arteries (http://theconversation.com/how-our-species-got-smarter-throu...). Other research has linked the development of hominid intelligence to meat consumption (https://www.berkeley.edu/news/media/releases/99legacy/6-14-1...) and the development of civilization to cheese and dairy consumption (https://www.motherjones.com/environment/2015/04/cheese-envir...).
It's not clear that these changes were driven by evolution, i.e. that "evolution made us smart". Rather, there appears to be a confluence of environmental and genetic factors that developed intelligence as a side-effect.
Up until very recently (say 70,000 years ago), intelligence wasn't even a trait that afforded us any special advantages over our environment. If you follow the Toba theory, there was a massive ecological disaster that applied a significant selection pressure on early humans, and the use of tools and fire may have enabled some members to survive while others died out. And even then, we didn't really start to subjugate our environment until about 12,000 years ago.
So I think we have some survivorship bias in our thinking about the evolution of intelligence. When someone says that evolution naturally leads to intelligent species, I just don't see the evidence for it. Evolution had over a hundred million years of complex, highly-adapted, large fauna to work with, but the dinosaurs didn't build skyscrapers.