Rajorshi Roy replies: The Shanghai Cooperation Organisation (SCO) has emerged as a prominent Eurasian organisation in the last few years. Today, it has expanded in geographical reach, scope and importance. Along with its eight full members as well as dialogue and observer partners, SCO today straddles Central, South, West and North Asia. This makes it one of the world’s largest pan-regional organisations. SCO’s growing heft is reflected in it contributing 30 per cent of the global GDP and 40 percent of the world’s population.