The Muslim League of Nations
We have said that the Prophet reinstated the princes and kings to their thrones and kingdoms. Toward the end of the Prophet's life the Arabian Peninsula was truly a league of Arab-Islamic nations. None of them was a colony either of Makkah or of Yathrib. By virtue of their strong faith in God, the Arabs were all equal to one another before Him. They acted together like one man against anyone who was against them or sought to sway them away from their religious faith. Up to the age of decline, the Muslim peoples remained a league of nations, and the seat of the caliphate was the headquarters of their league. The caliphate never claimed for itself any authority over the Muslim spirit, nor did it ever monopolize knowledge and the search for enlightenment. No Muslim nation submitted to any spiritual authority except that of God. The Muslim capitals were all capitals of science, knowledge, art, and industry. This felicity continued until the Muslims changed their view of Islam, denied its noble principles, violated the brotherhood of the faithful, and forgot that man's faith is never complete until he has desired for his fellow man what he desires for himself. It was then that prejudice did its evil work and destructive contests for power tore up the Muslim brotherhood as the sword became sole judge. But whoever takes with the sword shall be taken by the sword.
After the 15th century, Christian Europe arose to a new life of the spirit which might have brought benefit to all mankind except for the corruption that had quickly found its way to it. Hence, Christianity began to split into many factions. It was in this relatively recent period of its rise that Christian Europe faced a Muslim World that had forgotten its Islam, and took it by the sword. Europe continued to take the Muslim people by the sword, and, indeed, made the sword the sole judge between it and the Muslim people. But when the sword rules, we can then bid farewell to reason, to science, to goodness, to love, to faith, and, indeed, to mankind and to humanity.
It is the rule of the world by the sword which is the cause of the spiritual and psychic crisis from which the world suffers and groans. Those countries which rule the world by the sword realized this unfortunate truth as a result of World War I. They thus sought to bring peace to the world, and, for this purpose, they established the League of Nations. The whole point of the League of Nations is summed up in this verse of the Qur'an
"And if two factions of believers fight each other, reconcile them in peace. If, thereafter, one aggresses upon the other, then fight the aggressor until it returns to the command of God. If it heeds that command, reconcile that faction again with justice, for God loves justice and those who judge accordingly. The faithful are brothers of one another. Reconcile them therefore as brothers. Fear God that you may be shown mercy." [Qur'an, 49:9-10]