What average intelligence means is that 50% of people have IQ bellow average and 50% have above average IQ. There is always some average so that is immutable rock solid fact and applies to all the nations on the planet Earth equally.
That means that in UK that has 60 million people 30 million people have IQ bellow average. US has 350 million, so 175 million of Americans have IQ lower than average. But that all pales in a comparison with China, with its 1.5 Billion people, China has 750 million people with IQ bellow average. I'm just putting some numbers on it to create a picture in your mind that human stupidity is an enormous social force to recon with.
To put things into a perspective US army doesn't accept recruits whose IQ is only 80% of the average. That's sad, because it would be better if army accepted more stupid people, particularly during time of war, but that's a subject for another time.
Now back to a science of God.
Question is how are you going to explain scientific method, all the maths, quantum mechanics, general relativity and artificial intelligence to somebody with IQ bellow average. YOU CAN'T! So, the only thing you can do is to tell them "what they want to hear". And "what they want to hear"? They want to hear a fairy tales. We are into fairy tales since we got out of Africa. So you go out and find few SMART guys who are good with fairy tales ( Buddha, Mohammad, Jesus, Charles Manson, Jordan Peterson etc. ). Obviously there are hundreds of thousands of SMART guys who can tell great fairy tales so that's easy part, but it makes for overcrowded marketplace and cut-throat business model with lots of backstabbing.
Frightening point I am trying to make here is that it is easier to unite stupid people into a social force than smart people. So, now you have 30 million bellow average IQ people in UK, 175 million in US and 750 million in China and if they say that God exist you better step out of their way. They won't be asking for any reasons or they won't be following any logic because there is 30 + 175 + 750 M = 955 M of them.
But is there a God? Of course there is God. But its not coming in a form of fairy tale for bellow average IQ guys, its coming in a form of a special language, the mathematics. You want to laugh at me? Check this chart bellow:
View attachment 16047
That chart shows growth of income per head ( or simply a salary ) through human history. You see that yellow part? Yellow part is ( approximately )
when calculus was discovered in a second half of 17th century. Difference between the highest point of average salary in modern times and the average salary back in 17th century is 40 times, or 4,000%. Yes, human income was growing before the discovery of calculus, but at a ridiculously irrelevant rate. Yellow time was the time when fairy tale tellers were dominating society but fairy tales can't increase your salary and your living standards.
Language of mathematics can.
90% of all scientific discoveries can not be done without calculus, which means that 90% of modern industries that depend on these scientific discoveries would never be born.
Here is a small subset of discoveries that can't be made or perfected without calculus: all of nuclear science, aircraft wing, propeller, electromagnetism, nature of light and radio-waves, transistors, DNA, computers, Internet, distribution of electricity, nuclear magnetic resonance. Each of these, and many other scientific discoveries, created a huge industries that today FEED MILLIONS OF PEOPLE and increase their living standards. Yes, its Newton's and Leibnitz's calculus that's putting food into your spoon and feeding you, its not your hard work.
With all of your hard work you'll be still living in a stone age and most likely die few days after being born, like majority of these folks before 17th century in yellow part of the graph. Or at least, that one who feeds you, the language of mathematics, should be your God, not the "ferry tale God" that just tells you want you want to hear.
So there is your "God".
Teach yourself language of mathematics ( if your IQ is not bellow average ).