There is no set belief other than God did create mankind and we fell, we were in a state different than we were now. Whether that means a literal genesis or a metaphorical genesis is up for discussion. I have seen orthodox adamently opposed to evolution of any sort, I’ve also seen Orhtodox who support evolution viewing it as consistent with their faith. There is room for difference of opinions on this subject within the church.
I’m an anthropologist. Interestingly, there were a number of human species that inhabited Africa, Eurasia, and south-east Asia before modern
Homo sapiens sapiens proliferated. These humans were every bit as human as you and I, but they were a bit different. It isn’t even that they weren’t as intelligent as us, but the archaeological evidence indicates they clearly had a very different disposition than us. Us “modern humans” have a tendency towards exploiting one another and our natural resources beyond what is sustainable, and this is evident in our archaeological record as well. But the people who proceeded us did not. They largely lived in harmony with one another, and with their environment. Was there interpersonal violence? Yes, almost certainly. But there was not genocide, terrorism, or unabated, unadulterated horrific violence and exploitation of what the Father had afforded them. As a result, these people lived on the face of the earth for hundreds of thousands of years longer than we have, without damaging it or killing themselves off. We killed them off. Once we came about, we exploited our resources, killed ourselves and other kinds of people, and we’re now in a downward spiral after only ~200,000 years on the planet, when other human groups had existed for millions of years.
There is a major parallel. Human kind was created in God’s image. Those humans proliferated, diversified, and many slightly different variations evolved, but all were more similar to one another than they were different (
Homo habilis,
Homo erectus,* H*. antecessor,
H. heidelbergensis,
H. neandertalensis, etc) and all shared a basic human nature. Then, we came along. We weren’t better or smarter. Instead, we committed the original sin, and through us sin entered the world, and through sin entered evil. This is why we exploited and killed the other human groups, and this is why we exploit and kill one another. This is why we sin.
My interpretation of Gensis is indeed metaphorical. Food for thought.