Unity , in my opinion, is highly important because it is a vital aspect to have in a country. imagine :individuals who ignore unity. what will happen to them in the future? there would be war every day. the number of outcasts in a country would increase drastically. our country's image would immediately fall. tourists wouldn't even consider visiting our country when there are so much chaos and mayhem happening there, simply because nations there are not living in harmony.
unity is there for a reason : which is to make the world a better place. helping one another would make everyone better and holistic individuals.
hope this helps.