La cité idéale de Platon, un autre monde possible ?

The already multi-century literature on utopia has gained renewed interest in recent years through a series of publications that must serve as a response to the social and societal imbalances of our time. The only way to save the world would be to reinvent it. The origin of this approach is to look into the work of Platon. In his Republic, he describes an ideal city (“Callipolis”). Is this city an impossible to achieve utopia or rather an ideal presenting itself as a philosophical posture?