The decline of the Ottoman Empire, 1566 ..

Positions at court and throughout the bureaucracy were won and lost
depending on one's standing with powerful officials in the Abbasid hierarchy,
and these great men could in turn be elevated or dismissed on the whim of the
caliph.

The "Good Life" And Its Enemies In The Abbasid Age

The luxurious life-style of the Abbasid rulers and their courtiers both
reflected the new wealth of the political and commercial elites of the Islamic
Empire and intensified sectarian and social divisions within the Islamic
community.

The Rise and Decline of the Ottoman Empire — Global Issues

One legacy of the Islamic Ottoman Empire is the robust  of modern Turkey.

Islam, From Arab To Islamic Empire: The Early Abbasid Era

Why did the Ottoman Empire enter in a period of decline in 17th century? The most obvious reason is the fact that every expansion has an end, and every empire has a life span. In the recent years, the thesis of Ottoman decline is disputed. There are historians, such as Jonathan Grant, who contest the popular understanding that the Ottomans experienced a decline, arguing that this view is just a negative Eurocentric judgement that does not help our understanding of the events that happened in the late Ottoman history. Grant is probably right about the existence (and dominance) of an Eurocentric symplistic view among the old historians in Europe, yet it is undisputable that the Ottomans experienced more decline and less transformation after the 17th century onward.

Parthia: The Parthian Empire - History and Coins of Ancient Parthia

Although the Ottoman Empire was widely influenced by the faiths and customs of the peoples it incorporated, the most significant influences came from Islam.

This Islamic Empire was strong enough to challenge the  in the west and the  in the east.

The Rise and Decline of the Ottoman Empire — Global …

There is another important factor explaining the reasons of Ottoman decline. It is the lack of receptivity. Islamic civilization was profoundly convinced of its superiority. This was a brake against the innovation and implementation of new practices. The West started to move ahead - new technologies, deep political reforms and intellectual awakening - the European transition to modernity and industrialism passed unnoticed by the ruling Ottoman class in the 17th and early 18th centuries.

The Rise and Decline of the Ottoman Empire

From Figure 5 we see that in Europe as a whole the percentages of both Christians and Muslims changed during the previous century, with that of Christianity declining by 16% and that of Islam increasing by 4% from 1900 to 2010 (Table 2). The decline of Christianity as a whole reflects declines in both Roman Catholic and Protestant denominations. The significant increase in Muslim presence in Europe began around the 1960 time frame.

historical development of Christianity in the world and continents from a statistical view, also compared with Islam

Decline of Mughal Empire Essay – Free Papers and …

The decline started when the expansion stopped. The expansion was in the character of the early Ottoman state, it was in the heart of Ottoman culture, and it was also the source of its energy. The early Turks had a frontier psyche. When the sultan retired at his palace in Istanbul, the Ottoman Empire changed its initial character; the Turks had to change their worldview.

The Ottomans inflicted a series of defeats on the declining Christian Byzantine Empire and then quickly expanded westward.

Q: Briefly explain three reasons for the decline Mughal Empire?

The
resulting erosion of their legitimacy had much to do with the extended decline
of the caliphates' authority, particularly from the middle of the 9th century
onward.

Islamic Conversion And Mawali Acceptance

Popular enmity for the political elite was offset to some extent by the
fact that the Abbasid era saw the full integration of new converts, both Arab
and non-Arab, into the Islamic community.

Islamic world: Islamic world, prehistory and history of the Islamic community

the Arab Conquests and the Creation of an Islamic Empire

In fact, as the Abbasid rulers became more dissolute and
consequently less interested in affairs of state, a number of powerful Persian
families close to the throne became the real locus of power within the
imperial system.

[See Persian School: A Persian school - bastinado for an unruly pupil.]

Commercial Boom And Urban Growth

The rise of the mawali was paralleled in the Abbasid era by the growth in
wealth and social status of the commercial and landlord classes of the empire.
The Abbasid age was a time of great urban expansion that was linked to a
revival of the Afro-Eurasian trading network, which had declined with the fall
of the Han dynasty in China in the early 3d century A.D.