Nobility is a social class normally ranked immediately under royalty and found in some societies that have a formal aristocracy. Nobility possesses more acknowledged privileges and higher social status than most other classes in society. The privileges associated with nobility may constitute substantial advantages over or relative to non-nobles, or may be largely honorary (e.g., precedence), and vary by country and era. As referred to in the Medieval chivalric motto 'noblesse oblige' ('nobility obliges'), nobles can also carry a lifelong duty to uphold various social responsibilities, such as honorable behavior, customary service, or leadership positions. Membership in the nobility, including rights and responsibilities, is typically hereditary. It was the Spaniards who gave the world the notion that an aristocrat's blood is not red but blue. The Spanish nobility started taking shape around the ninth century in classic military fashion, occupying land as warriors on horseback. They were to continue the process for more than five hundred years, clawing back sections of the peninsula from its Moorish occupiers, and a nobleman demonstrated his pedigree by holding up his sword arm to display the filigree of blue-blooded veins beneath his pale skin—proof that his birth had not been contaminated by the dark-skinned enemy. Nobility is a social class normally ranked immediately under royalty and found in some societies that have a formal aristocracy. Nobility possesses more acknowledged privileges and higher social status than most other classes in society. The privileges associated with nobility may constitute substantial advantages over or relative to non-nobles, or may be largely honorary (e.g., precedence), and vary by country and era. As referred to in the Medieval chivalric motto 'noblesse oblige' ('nobility obliges'), nobles can also carry a lifelong duty to uphold various social responsibilities, such as honorable behavior, customary service, or leadership positions. Membership in the nobility, including rights and responsibilities, is typically hereditary. Membership in the nobility has historically been granted by a monarch or government, unlike other social classes where membership is determined solely by wealth, lifestyle, or affiliation. Nonetheless, acquisition of sufficient power, wealth, military prowess, or royal favour has occasionally enabled commoners to ascend into the nobility. There are often a variety of ranks within the noble class. Legal recognition of nobility has been more common in monarchies, but nobility also existed in such regimes as the Dutch Republic (1581–1795), the Republic of Genoa (1005–1815), the Republic of Venice (697–1797), and the Old Swiss Confederacy (1300–1798), and remains part of the legal social structure of some non-hereditary regimes, e.g., Channel Islands, San Marino, and the Vatican City in Europe. Hereditary titles and styles added to names (such as 'Prince' or 'Lord' or 'Lady'), as well as honorifics often distinguish nobles from non-nobles in conversation and written speech. In many nations most of the nobility have been un-titled, and some hereditary titles do not indicate nobility (e.g., vidame). Some countries have had non-hereditary nobility, such as the Empire of Brazil or life peers in the United Kingdom. The term derives from Latin nobilitas, the abstract noun of the adjective nobilis ('well-known, famous, notable'). In ancient Roman society, nobiles originated as an informal designation for the political governing class who had allied interests, including both patricians and plebeian families (gentes) with an ancestor who had risen to the consulship through his own merit (see novus homo, 'new man'). In modern usage, 'nobility' is applied to the highest social class in pre-modern societies, excepting the ruling dynasty. In the feudal system (in Europe and elsewhere), the nobility were generally those who held a fief, often land or office, under vassalage, i.e., in exchange for allegiance and various, mainly military, services to a suzerain, who might be a higher-ranking nobleman or a monarch. It rapidly came to be seen as a hereditary caste, sometimes associated with a right to bear a hereditary title and, for example in pre-revolutionary France, enjoying fiscal and other privileges. While noble status formerly conferred significant privileges in most jurisdictions, by the 21st century it had become a largely honorary dignity in most societies, although a few, residual privileges may still be preserved legally (e.g., Netherlands, Spain, UK) and some Asian, Pacific and African cultures continue to attach considerable significance to formal hereditary rank or titles. (Compare the entrenched position and leadership expectations of the nobility of the Kingdom of Tonga.) Nobility is a historical, social and often legal notion, differing from high socio-economic status in that the latter is mainly based on income, possessions or lifestyle. Being wealthy or influential cannot ipso facto make one noble, nor are all nobles wealthy or influential (aristocratic families have lost their fortunes in various ways, and the concept of the 'poor nobleman' is almost as old as nobility itself). Various republics, including former Iron Curtain countries, Greece, Mexico, and Austria have expressly abolished the conferral and use of titles of nobility for their citizens. This is distinct from countries which have not abolished the right to inherit titles, but which do not grant legal recognition or protection to them, such as Germany and Italy, although Germany recognizes their use as part of the legal surname. Still other countries and authorities allow their use, but forbid attachment of any privilege thereto, e.g., Finland, Norway and the European Union, while French law also protects lawful titles against usurpation.