Interestingly, a book that I have been reading this week talks about just that. The book is called 'Of Sacraments and Sacrifice" by Clifford Hall, S.J. and was published in 1952 by the Liturgical Press. The chapters in the book originally appeared as a series of articles in “Worship”, a review dedicated to the liturgical apostolate. The chapter on Sacrifice begins with how from the very beginning, there has been no race or tribe that did not believe that there is some power or power guiding man’s destiny. That when men believe in a god, they have fellings of reverence, fear, hope, desire and adoration. Because of these feelings man does things expressive of adoration. Father Hall goes on to talk about how ancient cultures practiced this adoration. Always in the form of a sacrifice. He talks about the Aztecs, the ancient Greeks and Romans, the early Celts and Britons, and the early Jews. Although there were local variations there was always an underlying uniformity. They always assembled in crowds; they brought some object with them, did something to it then often ate and drank of it.
In summary, Father Hall said that in general, when men desire to worship the god they believe in :
a) They come together to some “holy- place-of-the -god” which is usually a stone or a rock. We call this place an altar.
b) The proceedings are led by a specially authorized person in charge of the worship. We would call him a priest.
c)An object of some kind, provided by the community is placed on this altar by the priest; usually he does something to it [killing, burning,pouring out] to show that the community is now ceasing to pocess it. There is a name for this action. It is called “immolation”.
d)Sometimes, although not always, the whole act of worship ends with a community meal at which those present eat or drink of whatever it was that was put onto the altar.
After talking about the ancient worship practices, the chapter goes on to explain the meaning of Sacrifice as we understand it as Catholics. But it does seem that that the basic rite of worship certainly does have origins from pagan times.