How does the poet suggest that all people on the earth are the same?

The poem reminds people that all kinds of divisions based on nation, religion, caste or creed are groundless since all human beings are similar in their basic need of the common resources such as air, water and the sun required for the existence of humanity. It suggests that since all people on earth have a common source of origin, all kinds of violence must be given up which would eventually unite everyone for the betterment and well being of the human race.