= "Koinonia (/ˌkɔɪnoʊˈniːə/) is a transliterated form of the Greek word κοινωνία, which refers to concepts such as fellowship, joint participation, the share which one has in anything, a gift jointly contributed, a collection, a contribution". 
"It identifies the idealized state of fellowship and unity that should exist within the Christian church, the Body of Christ. The term may have been borrowed from the early Epicureans—as it is used by Epicurus' Principal Doctrines 37–38"
"The Spirit of Koinonia
Einstein and his friends illustrate the staggering potential of collaborative thinking. The notion that open and honest collaboration allows thinking to grow as a collective phenomenon can be traced back to Socrates and other thinkers in ancient Greece. Socrates and his friends so revered the concept of group dialogue that they bound themselves by principles of discussion that they established to maintain a sense of collegiality. These principles were known as “Koinonia” which means spirit of fellowship." (https://www.cruxcatalyst.com/blog/awakening-our-collaborative-spirit?)
The principles they established were:
In Greek, the word dialogue means a “talking through.” The Greeks believed that the key to establishing dialogue is to exchange ideas without trying to change the other person’s mind. This is not the same as discussion, which from its Latin root means to “dash to pieces.” The basic rules of dialogue for the Greeks were: “Don’t argue,” “Don’t interrupt,” and “Listen carefully.”
Clarify Your Thinking
To clarify your thinking, you must suspend all untested assumptions. Being aware of your assumptions and suspending them allows thought to flow freely. Free thought is blocked if we are unaware of our assumptions, or unaware that our thoughts and opinions are based on assumptions. For instance, if you believe that certain people are not creative, you=re not likely to give their ideas fair consideration. Check your assumptions about everything and try to maintain an unbiased view.
Say what you think, even if your thoughts are controversial. The ancient Greeks believed these principles allowed thinking to grow as a collective phenomenon. Koinonia allowed a group to access a larger pool of common thoughts which cannot be accessed individually. A new kind of mind begins to come into being which is based on the development of common thoughts. People are no longer in opposition. They become participants in a pool of common ideas, which are capable of constant development and change.
The notion that the collective intelligence of a group is larger than the intelligence of an individual can be traced back to primitive times when hunter-gather bands would meet to discuss and solve common problems. It is commonly understood and accepted practice. What’s difficult is the willingness of a group to discipline itself to brainstorm for ideas openly and productively. Alex Osborne, an advertising executive in Buffalo, New York, recognized this and formalized brainstorming in 1941 as a systematic effort and disciplined practice to produce ideas in a group.
Osborne’s idea was to create an un-inhibiting environment that would encourage imaginative ideas and thoughts. The usual method is to have a small group discuss a problem. Ideas are offered by participants one at a time. One member records ideas and suggestions on a flip chart or chalk board. All withhold judgment. After the brainstorming session, the various ideas and suggestions are reviewed and evaluated and the group agrees on a final resolution.
There are many problems with traditional brainstorming. Sessions can be undercut by group uniformity pressures and perceived threats from managers and bosses. Other sessions fail because people find it difficult to avoid judging and evaluating ideas as they are offered. Personality differences also come into play: some people are naturally willing to talk, while others tend to be silent.
All of us had a taste of good group brainstorming sessions at some time in our lives that provided ideas and thoughts we could never have imagined in advance. But these experiences come rarely and are usually the product of certain conditions." (https://www.cruxcatalyst.com/blog/awakening-our-collaborative-spirit?)