Some people have romantic idealistic concepts that society can live as one .

In spiritual terms, maybe , when by cultivating spiritual consciousness, one is able to see that consciousness particals are in each body , the very substance of life .

But materially speaking , individuals have always expressed differently and lived differently, both individually and collectively, as well as in  communial  ways and also  unique national cultural ways ..

In the vedas 5th Canto of the Srimad Bhagavatam,  the activities of King Prtu give the  description of the natural creation of  boundaries, such as oceans , rivers, and mountain ranges , so although harmony can be acheived in mankind it must be understood as being based on differences , which have sometimes complex social and karmic reasons , all societies should be respected and understood in mature ways .

The concept of  harmony in discord is only realised in the minds of those who are learned with the  consciousness of Divinity within their hearts , and  who have evolved love for Divinity as well as all beings , seeing  that everything is  connected to God , knowing they are all His expansions , such Divine inspiration creates the inconceivable oneness and difference vision in  our relationship with Him and all beings .

The vipras , Brahminical men, and Suddha Bhaktas know this very well  and realise it . By their association , we can also know and realise this truth .

It is never found in any  political leaders , who we could probably safely say are mostly lacking in real wisdom, and are sometimes  fools and rascals , so they must always  take direction from the real intelligensia as described above .