A rigid constitution is one that requires a special, often difficult, procedure for amendment. The primary advantage of this structure is that it provides a stable and predictable legal framework, preventing frequent or impulsive changes to the fundamental law of the land, thereby ensuring long-term institutional permanence.

Collective responsibility is a hallmark of the US presidential system (in specific contexts) or parliamentary systems depending on interpretation. Switzerland is famous for its frequent use of referendums. The UN represents international cooperation, while the US legal system is defined by the Due Process of Law. This matching aligns with standard comparative political frameworks.

The 22nd Amendment to the US Constitution limits the President to two terms. Similarly, the French Constitution, following the 2008 constitutional reform, limits the President to two consecutive five-year terms. In contrast, the Indian President and Vice-President are not subject to term limits under the Indian Constitution, allowing them to seek re-election indefinitely if they continue to meet the eligibility criteria.

Nizam-ul-Mulk Tusi, a prominent Islamic philosopher and statesman, argued that God chooses individuals to lead and ensure the well-being of humanity. This perspective reflects his concept of divinely ordained leadership, where the ruler acts as a steward of God's creation, responsible for maintaining justice, order, and the prosperity of the realm through righteous governance.

Abu Ali Hassan ibn Ali, famously known as Nizam al-Mulk Tusi, was a renowned Persian scholar, vizier, and author of the Siyasat Nama. Historical records generally cite his birth year as 1017 AD (408 AH) in the region of Tus, located in modern-day Iran. He played a pivotal role in the administration of the Seljuk Empire.

The 'Muqaddamah' is the famous historical and sociological work written by Ibn-e-Khaldun, not Nizam-ul-Mulk Tusi. While Tusi is the author of 'Siyasat Namah' (The Book of Government), the source answer incorrectly identifies it as a work he did not write. This conflict suggests a potential error in the source material, as 'Siyasat Namah' is widely recognized as Tusi's primary contribution to political administration and governance literature.

The 'Siyasat Nama' (Book of Government), written by the renowned vizier Nizam al-Mulk, is a seminal work in Islamic political thought. It provides detailed advice on administration, justice, and the duties of a ruler. Sultan Malik Shah reportedly held this work in high regard, viewing it as a foundational guide for the governance and legal structure of the Seljuq Empire.

Nizam al-Mulk Tusi, in his famous work 'Siyasat Nama' (Book of Government), extensively discussed the role of the ruler and used the Persian title 'Padshah' to refer to the sovereign, reflecting the influence of Persian administrative traditions on Islamic governance.

Nizam al-Mulk Tusi was widely revered for his profound wisdom, which guided his decisions as a statesman and his writings on governance. While he was a skilled administrator and a learned scholar, it was his ability to apply practical wisdom to the complex challenges of managing a vast empire that defined his legacy and earned him the title 'Nizam al-Mulk' (Order of the Kingdom).

The 'Safar Namah' is attributed to Nizam al-Mulk Tusi in this context, though historical scholarship often distinguishes between the vizier's political writings and other travelogues of the era. It serves as a reflection of his observations during his travels and administrative duties within the Seljuk Empire, providing insights into the political and social conditions of the 11th-century Islamic world.