Ordo Latin noun ordinis which can mean, in the military context, row, line, row, degrees of control, also social class, words, succession of time, rule, habit. The etymology gives account of the semantic complexity of this word. I would distinguish two levels: the ideal, mathematical and the factual or of the facts. The ideal is imposed by reason and we can understand it as a numerical succession, proportion, symmetry, balance and rationality; but when we went to the real world everything is relative, subjective and arbitrary, and above all when we apply it to the human and social world. An example would be the social order. When is social order there? Approach to it when everyone can have equal opportunities in education and mental development, access to wealth and well-being, when we can live together without violence, when we see others as a better collective life partners and not competitors that we hinder, when power is not self-service and service... Ay utopia!