Book from Download Strategic Estimate is Khilafah.com's annual assessment on the global trends, the emerging trends and the developments that have taken shape during the year between the world's powers. 2011 will remain long in the memory when the history books are finally written. What has now come to be known as the Arab spring began with a single man in the markets of Tunisia, which then spread to thousands on the streets in Cairo and evolved to hundreds of thousands demanding political change in the Muslim world. The self immolation of Mohamed Bouazizi in Tunisia created a sweeping wave, which crossed the artificial borders in the Muslim world encompassing Egypt, Libya, Yemen and Bahrain until it engulfed most of the Muslim world. 2011's Strategic Estimate, Khilafah.com's annual assessment of the global balance of power is dominated by the Arab spring. We concluded in our 2011 assessment that the US remained the world's superpower, ho