I struggle to consider Paganism a religion.
My years on RF have led me to organize religions into polytheistic and monotheistic. The polytheists broadly speaking are either pagans or Dharmics, and the monotheists are the Abrahamic religions. I realize that that isn't exhaustive, as monotheists also include Zoroastrians, but I've found the outline I suggested to be a useful framework for organizing religions.
This is also useful because the polytheists tend to be earth-oriented, whereas the Abrahamics focus is on other worlds and afterlives. Also, the polytheists aren't commanded by their gods. These are very important differences in my opinion, and why as an atheistic humanist, I identify more with the polytheists, whose attention to the here and now and their connection to nature is more like my own worldview and understanding of authentic spirituality, which is earth- and life-centered.
All religions are Infact half truths
You must have a different definition of truth than I do. I reserve words like truth, knowledge, correct, and fact for ideas that are demonstrably correct and which can be used to accurately predict outcomes. Other kinds of ideas can be called inspiring or irresistible intuitions, but not truth.
There’s several theories about how religion first started.
I think it's pretty obvious how religions came to exist. Once you add reasoning and language to any mammal, you'll get magical thinking and efforts to explain and control circumstances by appealing to unseen agents. This begins with nomadic peoples and is a bottom-up phenomenon with a simple hierarchy headed only by a shaman, who was also a hunter. Once we have civilization and large cities, we get organized religion and priests as specialists who don't do other work or support themselves. Instead, there is a large central meeting place where people come regularly to listen to and support the priesthood.
You can tell about when this happened with the Jews - whenever the Sabbath was invented. Think about it. In nomadic days, every able-bodied person worked every day, and it was no doubt a "sin" to be lazy or fake illness. But then life changed with the advent of civilization and cities, and people needed to travel to a central temple and spend hours there on a regular basis, and suddenly, it became a "sin" not to take a day off from work and bring the family to the temple. This became institutionalized two ways. The Commandment to not work on the sabbath was added to others, and the creation myth was modified to include a timeline and a new unit of time, the week for the six days of creation and one of rest. If God rested one day in seven, you need to as well.
And think about the week. Compare it to the other units of time - the day, the month, and the year. These are all natural and correspond to the motions of the moon around the earth and the earth around its axis and around the sun. If monthly visits to the temple were too infrequent and daily visits too frequent, a new unit was needed, and so, we have the invention of the work week and the weekend.
This is the top-down aspect of religion, when it becomes organized, centralized, and an extensive, authoritarian hierarchy and an official, codified orthodoxy are created.
Like I suggested, give monkeys speech and symbolic reasoning, and they'll invent gods and religions that day.
I suspect in a world without religion even more people would have died.
I suspect the opposite. Let's ask the Israelis and Gazans.
A few great "myths" about religions like Christianity and Islam are that they are religions of love, that they are moral exemplars and generate moral people, and that the charity they provide is more than just crumbs. They've successfully marketed themselves as such as your comment suggests, but the facts say otherwise.
"Religion. It's given hope in a world torn apart by religion." - Jon Stewart
While sad. I wouldn't blame the religion for it.
That was in response to, "The report estimates that 216,000 children were abused by Catholic priests between 1950 and 2020, and that accounting for abuse by other Catholic church employees increases the total number to around 330,000. Around 80% of the victims were boys. Wikipedia"
You wouldn't blame Catholicism for that and its unnatural, imposed celibacy for that? I do. Priests can't date or have families. Like prisoners, they have the sex that their situation limits them to. And thought the Church would probably prefer that their priests not become pedophiles, if the choice is between that and letting them have families, the pedophilia is much less expensive than supporting priests' families, and until recently, free. Today, it costs a bundle in dollars and lost respect, but that's a modern phenomenon.