David Bohm (1917-1992) was a theoretical quantum physicist. His work in this extraordinary and subtle field led him to a deep interest in the relationship between the observer and the observed, which arose out of the discoveries of quantum mechanics. This interest led to a concern with the processes of consciousness, thought and memory. He became increasingly aware that our inability to see or understand these processes was making the world an ever more dangerous place for human beings.
In his later years, he proposed that it was essential for thought to “know itself” if it were to address these dangers. He suggested that if people could sit and talk together in groups of 20-40 (as it is believed our hunter gatherer ancestors did), not in discussion but in a fully engaged and open flow of meaning, then thought might be able to become aware of its own workings.
Over the last three decades various groups of people around the world have come together, either for short periods or regularly over months or years, and in larger or smaller numbers, to explore for themselves and in practice whether it might be possible to become aware of the hidden assumptions of thought which seem to be leading us into incoherence.
There are many sources of information about Bohm’s thinking on dialogue, but a booklet based on a conversation with him in 1991 called Dialogue – A Proposal (Link) would be a good starting place.