Who called for unity among all Muslims?

God, as stated in Quran, called all people for unity and cooperation for mankind benefit and prosperity; irrelevant to their religions. Accordingly, if one calls Muslims for unity then it is within the call for all world for unity. Unity doesn't necessarily mean physical unity. It is rather unity in fulfilling goals of peace, love, justice, prosperity, and equality.
God, as stated in Quran, called all people for unity and cooperation for mankind benefit and prosperity; irrelevant to their religions. Accordingly, if one calls Muslims for unity then it is within the call for all world for unity. Unity doesn't necessarily mean physical unity. It is rather unity in fulfilling goals of peace, love, justice, prosperity, and equality.