In Islamic legal theory, failure in implementation does not negate obligation. One does not abandon prayer because some pray without concentration, nor fasting because it is done without reflection. Similarly, the appointment of a Caliph is not annulled by the misconduct of rulers.
The socio-economic conditions cited as priorities are not natural disasters, but consequences of flawed political systems. Capitalist structures exacerbate inequality; nation-state borders fragment Muslim unity and obstruct coordinated development; education systems inculcate secular epistemologies detached from the Islamic worldview. These are structural issues that no amount of charity or individual activism can resolve within the current paradigms.
The hadith stating that “the Caliphate after me will last thirty years” is a descriptive prophecy about the era of Prophetic-model Caliphate, not a prescriptive limitation on the Islamic obligation of political unity and leadership. The idea that Islam abandoned the concept of Caliphate after thirty years has no basis in classical jurisprudence, historical practice, or theological reasoning.