Religion Slowly Dying Out

All people are born Atheist and then taught to believe in some sort of Creator but you would need to go back thousands of years to try and work out how the ideas of religion began.
It is perfectly plausible that the first God's were invented by early man to help make sense of the inexplicable world around him they did not understand.
They would have seen a bright orb of light and heat in the sky and thought it must be a supernatural spirit watching over them.
When the Earth shook under their feet they thought obviously some mighty spirit living in the Earth must be stirring and why is that mountain spitting out liquid fire? Must be an angry spirit that needs to be appeased.
Over time, as man’s knowledge grew, those old spirits ran out of reasons to stick around but the idea of gods just took on different forms.
Countless gods, and at the last count there have been over 4,000 of them are known, have been lost to time as cultures and peoples died out, but the concept remained generally the same.
The Gods of today are just the latest incarnation of an archaic suggestion that has seen many gods rolled into on and imbued with even greater powers over people's lives and even into the afterlife which is either to be spent in paradise or in eternal damnation which has been used by innumerable leaders to try and control the masses.
Once the initial concept of god was created, all it required was for it to be handed down from parent to child, generation after generation, to be accepted as true and factual.
All God's are nothing more than a persistent idea which has been perpetrated and passed on to the next generation but the question is if you were not told all this and you were also not told of the science of how things work, how would you fill the gaps in your knowledge?
I assume you would go down the same route as the early humans but in the modern world we do have science, education and widely available and detailed explanations of Earthquakes, Volcanoes and the Sun so why are the mythologies of the past not dying out quicker than it is?
It may take many generations before religion is forgotten as future generations find religion to be an unimportant aspect of every day life despite the indoctrination of beliefs and the constant reinforcement from older generations but it means that the age of religion will slowly but surely come to and end as the number of indoctrinated children passing on their 'knowledge' grow fewer.