The Muslim is compelled to care for the Islamic Ummah for he is bonded to it by the strongest bond of all, the bond of Imaan. The Muslim’s bond with the Ummah is stronger than the bonds of family and is likened to a single brotherhood, for Allah (swt) said,
إِنَّمَا ٱلۡمُؤۡمِنُونَ إِخۡوَةٌ۬
“The believers are but a brotherhood.” [Surah Hujaraat 49:10]
The bond of Imaan instills the longing for collective well-being, which overrides the selfish tendencies. The bond of Imaan binds the believers as if they were one whole body, connected by blood vessels and nerves, such that the suffering of any of its parts causes restlessness and pain in the whole being.