Moses, peace be upon him, knew the outward knowledge, and they claimed that he is alive, hidden at all times! Finally, we read in the Ottoman Empire about the system of futuwwa and their cooperation with each other, and the Bektashi and Naqshbandi orders, and other secret systems and hidden teachings. From this, you hear an echo of the Ismaili systems and their calls, and perhaps it was an echo of the influence of Ismaili principles in Europe. There, there are teachings similar to theirs in the systems of monasteries and associations. Perhaps the Qarmatians had a noticeable influence on the systems of Jesuit monasticism, and perhaps the days will reveal that. One of the principles of the Qarmatians was to impose taxes on the poor to be distributed to the sick and needy among them when necessary, which resembles the work of modern unions. How much the Crusaders adopted systems in their wars with the Muslims, perhaps including the Ismaili and democratic system that prevailed in European associations. From this, we see how Mahdism played a role in the history of Islam, and unfortunately, it afflicted it with two great calamities: the first is the great weakening of the Muslims' standing due to these successive revolutions, and the second is the spread of these myths and illusions among them, which weakened their minds.