Wolfgang Simsons book "Houses That Change The World" can be found
here.
I offer the following from his book on your question about communion.
The end of the Lord´s Supper
Another victim of this process was ”the Lord’s Supper”. Since it is quite difficult to feed a cathedral full of people with real food, it degenerated into a religious and symbolic ritual, offering microscopic sips of wine and a small wafer, often enough only to the ”clergy” while the masses looked on in pious amazement. This meant that the ”Lords Supper” was a supper no more, and lost it’s powerful meaning of a redeemed species doing the unheard of: people, irrespective of classes and caste, revolutionarily sharing real food with a prophetic meaning, having dinner with God, expecting his physical presence at any time just like after the resurrection. It thus became ”the Eucharist”, a pious and symbolic shell of the original meal of a tasty lamb that Jesus shared with his disciples. By AD 150 the eucharist and the love feast were two distinct parts of the Lord's Supper. Biblical commentator William Barclay says it like this: ”The celebration of the Lord’s Supper in a Christian home in the first century and in a cathedral in the twentieth century cannot be more different, they bear no relationship to each other whatsoever.”