Discipline is an act of training of restricting, intending to poduce a specific character or pattern of behaviour. producing moral, physical or mental development in a particular direction.
i think that discipline is indeed important in today's society. human beings are a very large civilization, an entire community comprising of billions of people. being termed as "civilised" people, there must be something that allows us to differentiate us from other species such as the orang utans or chimpanzees who are the animal which closest resemble a human being. the "thing" that differentiates us or gives us the right to use the word "civilised" is discipline.
-to a large extent, discipline keeps order.
-it leads to a certain "guideline" having to be met in whatever is done.
eg, there is indeed freedom of expression of speech and expression. however, people do not openly express racism out of both self-discipline and disciplinary actions in the form of being charged in court should a person pose a threat to racial harmony.
-schools must have school rules, families must have house rules and such as it prevents chaos from breaking loose.
-any disruption to public peace etc will cause massive losses to the economy as a whole and thus people wish for smooth sailing things in whatever they do. hence many tend to use discipline to force all others to toe the line and prevent unnecessary slip ups.
-discipline is strongly emphasized in places such as the army and in prison
-discipline ensures a certain sense of seriousness in whatever is done and hence keeps a more formal tone.
in conclusion, discipline is of utmost importance in today's society. without discipline, many things which are presently a given would disappear and the society would be in total chaos as people can do things as and when they like, causing major disruptions to a country's economical progress and such. therefore discipline has to be enforced .