In this poem ‘Where the Mind is Without Fear’ Tagore seems to be in favour of internationalism, in favour of a united world of people. In lines 3-4 he says:

Where the world has not been broken up into fragments 
By narrow domestic walls

These two lines expresses the poet’s view of an undivided world. He feels there should be no walls between men in the name of class, caste, colour, race, religion, linguistic difference, or even country. The terms ‘the world‘ and ‘domestic walls‘ prominently conveys the message of internationalism here. The poet is pitching for a world that is not broken up and he is against the domestic barriers between people.