The Evolutionary or Historical Theory posits that the state is the result of a gradual process of development. The key factors identified in this growth include kinship, which provided initial social cohesion; religion, which offered moral and social unity; force, which established order and defense; and political consciousness, which allowed for organized governance and law.

Understanding the modern state requires a deep dive into its political history. By tracing the evolution of governance, power structures, and societal changes over time, scholars can identify the foundational events and ideological shifts that shaped current state institutions. Political history provides the necessary context to explain why states function the way they do today, moving beyond mere theoretical frameworks to observe the practical development of sovereignty and authority.

The sixteenth century marked a pivotal transition in European political history. The decline of feudalism, driven by economic shifts and the consolidation of monarchical power, paved the way for the emergence of centralized nation-states. This period saw the weakening of decentralized noble authority and the rise of sovereign entities that would define the modern international order.

A written constitution is typically codified in a single document and created by a formal constituent assembly or convention at a specific point in time. In contrast, an unwritten constitution, such as that of the United Kingdom, is not contained in a single document. Instead, it evolves over time through statutes, judicial decisions, conventions, and historical customs, rather than being enacted by a single formal constituent body.

The Roman Empire made monumental contributions to jurisprudence, most notably through the development of a systematic and universal code of law. This legal framework, which evolved from the Twelve Tables to the Justinian Code, provided a consistent set of rules that influenced legal systems across Europe and the Western world for centuries.

A cumulative or evolved constitution is one that has not been written at a single point in time by a constituent assembly. Instead, it emerges over centuries through customs, judicial decisions, conventions, and legislative acts. The British Constitution is the classic example of a cumulative constitution, as it reflects the historical growth and adaptation of political institutions rather than a singular, deliberate act of creation.

Liberalism emerged as a reaction against the restrictive structures of the medieval period, including the absolute power of the Church and the monarchy. While feudalism was the prevailing social and economic system that liberalism sought to move away from, it is categorized as the historical context rather than an external factor that triggered the liberal movement's specific ideological development.

Feudalism was the dominant socio-political system in medieval Europe, particularly within the Holy Roman Empire. It was characterized by a hierarchical structure based on land tenure, where lords granted land to vassals in exchange for military service and loyalty. This system emerged following the collapse of centralized Roman authority and defined the medieval period's political landscape, distinct from the earlier Roman Empire or the classical Greek city-states.

The establishment of colonial empires by European powers was largely driven by mercantilist and imperialist goals. The primary objective was to extract raw materials and exploit the economic resources of the colonies to bolster the wealth, industrial capacity, and strategic dominance of the mother country, often at the expense of the colonized populations.

In classical political theory, the state was primarily defined by its 'police functions,' which included maintaining law and order, protecting property, and defending the territory from external threats. The expansion into welfare and developmental functions is a relatively modern phenomenon associated with the rise of the welfare state in the 20th century.