The theme of living together appears to be utopian in our society today because this society seems to be much more concerned with the economy than with relations between people. This book proposes a clear idea on the past of these societies in relation to what is lived today, while trying to propose some solutions for the future. This will only be possible if Man comes to propose himself as the true guarantor of this change, as modernity has put him at the center of everything, so that all change passes through him.