Keeping in mind James Kirkup's poem 'No Men are Foreign' , What is the Need for the Hour in Todays Nuclear World?
I assume that when you say "need of the hour" you mean the thing that is most important in the world today. If that is the meaning, my answer is that what we need most is understanding and good will between people. This is more important than ever given that we have nuclear weapons that can kill millions of people very easily.
This idea is reflected in Kirkup's poem. He is making a plea for all people to see that they are similar to one another. It would be a call, for example, for people in Pakistan and India to realize that they share hopes and fears and are, essentially, the same. The hope is that, if they realize this, they will not want to attack each other, possibly with nuclear weapons.
In today's world with our ability to kill one another so efficiently, it is very important to (as Kirkup hopes we will) recognize our common humanity so we will not want to kill one another.