Football is the word given to a number of similar team sports, all of which involve (to varying degrees) kicking a ball with the foot in an attempt to score a goal. The most popular of these sports worldwide is association football, more commonly known as just "football" or "soccer". However the word football is applied to whichever form of football became most popular in each particular part of the world. Hence the English language word "football" is applied to "gridiron football" (a name associated with the North American sports, especially American football and Canadian football), Australian football, Gaelic football, rugby league, rugby union, and related games.


These games involve:

Two teams of usually between 11 and 18 players; some variations that have fewer players
(five or more per team) are also popular

a clearly defined area in which to play the game;

scoring goals or points, by moving the ball to an opposing team's end of the field and either into a goal area, or over a line;

goals or points resulting from players putting the ball between two goalposts
the goal or line being defended by the opposing team;

players being required to move the ball—depending on the code—by kicking, carrying or hand passing the ball;
and players using only their body to move the ball.

In most codes, there are rules restricting the movement of players offside, and players scoring a goal must put the ball either under or over a crossbar between the goalposts. Other features common to several football codes include: points being mostly scored by players carrying the ball across the goal line; and players receiving a free kick after they take a mark or make a fair catch.
Peoples from around the world have played games which involved kicking or carrying a ball, since ancient times. However, most of the modern codes of football have their origins in England.

Ancient games

The Ancient Greeks and Romans are known to have played many ball games, some of which involved the use of the feet. The Roman game harpastum is believed to have been adapted from a team game known as "επισκυρος" (episkyros) or phaininda, which is mentioned by a Greek playwright, Antiphanes (388–311 BC) and later referred to by the Christian theologian Clement of Alexandria (c.150-c.215 AD). The Roman politician Cicero (106-43 BC) describes the case of a man who was killed whilst having a shave when a ball was kicked into a barber's shop. These games appear to have resembled rugby football. Roman ball games already knew the air-filled ball, the follis.
Documented evidence of an activity resembling football can be found in the Chinese military manual Zhan Guo Ce compiled between the 3rd century and 1st century BC.It describes a practice known as cuju (蹴鞠, literally "kick ball"), which originally involved kicking a leather ball through a small hole in a piece of silk cloth which was fixed on bamboo canes and hung about 9 m above ground. During the Han Dynasty (206 BC–220 AD), cuju games were standardized and rules were established. Variations of this game later spread to Japan and Korea, known as kemari and chuk-guk respectively. By the Chinese Tang Dynasty (618–907), the feather-stuffed ball was replaced by an air-filled ball and cuju games had become professionalized, with many players making a living playing cuju. Also, two different types of goal posts emerged: One was made by setting up posts with a net between them and the other consisted of just one goal post in the middle of the field.

Medieval and early modern Europe

The Middle Ages saw a huge rise in popularity of annual Shrovetide football matches throughout Europe, particularly in England. The game played in England at this time may have arrived with the Roman occupation, but the only pre-Norman reference is to boys playing "ball games" in the ninth century Historia Brittonum. Reports of a game played in Brittany, Normandy, and Picardy, known as La Soule or Choule, suggest that some of these football games could have arrived in England as a result of the Norman Conquest.

An illustration of so-called "mob football".
These forms of football, sometimes referred to as "mob football", would be played between neighbouring towns and villages, involving an unlimited number of players on opposing teams, who would clash in a heaving mass of people, struggling to move an item such as an inflated pig's bladder, to particular geographical points, such as their opponents' church. Shrovetide games have survived into the modern era in a number of English towns (see below).
The first detailed description of what was almost certainly football in England was given by William FitzStephen in about 1174–1183. He described the activities of London youths during the annual festival of Shrove Tuesday:
After lunch all the youth of the city go out into the fields to take part in a ball game. The students of each school have their own ball; the workers from each city craft are also carrying their balls. Older citizens, fathers, and wealthy citizens come on horseback to watch their juniors competing, and to relive their own youth vicariously: you can see their inner passions aroused as they watch the action and get caught up in the fun being had by the carefree adolescents.