The Young Men's Christian Association ("YMCA" or in the USA "the Y") is a worldwide movement of more than 45 million members from 124 national federations affiliated through the World Alliance of YMCAs. Founded on June 6, 1844 in London, England by George Williams, the goal of the organization was putting Christian principles into practice, achieved by developing "a healthy spirit, mind, and body." The YMCA is a federated organization made up of local and national organizations in voluntary association. Today, YMCAs are open to all, regardless of faith, social class, age, or gender. The World Alliance of YMCAs is headquartered in Geneva, Switzerland.

History
Ninety-nine YMCA leaders of individual YMCAs from Europe and North America met for the first time before the 1855 Paris World Exposition to discuss the possibility of joining together in a federation to enhance co-operation amongst individual YMCA societies. This meeting resulted in the Paris Basis which is still a guiding principle of the organization today. Two themes resonated during the council: the need to respect the local autonomy of YMCA societies, and that the purpose of the YMCA is to unite all young, male Christians for the extension and expansion of the Kingdom of God. The need for the respect of local autonomy is expressed in the preamble:

The delegates of various Young Men’s Christian Associations of Europe and America, assembled in Conference at Paris, the 22nd August, 1855, feeling that they are one in principle and in operation, recommend to their respective Societies to recognize with them the unity existing among their Associations, and while preserving a complete independence as to their particular organization and modes of action, to form a Confederation of secession on the following fundamental principle, such principle to be regarded as the basis of admission of other Societies in future.

Three principles
The YMCA's traditional symbol is the inverted triangle which represents the organization's three principles. It was created in 1891 by Luther Halsey Gulick, Jr. at Springfield College. The three principles are as follows.

Healthy spirit
The first YMCA was concerned with Bible study, although the organization has generally moved on to a more holistic approach to youth work. Around six years after its birth, an international YMCA conference in Paris decided that the objective of the organization should become "Christian discipleship developed through a program of religious, educational, social and physical activities" (Binfield 1973:265). More recent objectives as found on the YMCA UK website include no reference to discipleship.

Restore Ministries of the YMCA of Middle Tennessee provides an example of how the Christian influence in the YMCA still exists today.[10] Founded in 2000 by Scott Reall, Restore provides support groups and individual counseling with an aim of “lifting the ‘C’” (of the YMCA).

Healthy mind
Many colleges and universities owe their creation to the YMCA. Springfield College was founded in 1885 as an international training school for YMCA Professionals, while Sir George Williams University—one of the two schools that eventually became Concordia University—started from night courses offered at the Montreal YMCA. Northeastern University (Boston, Massachusetts) began out of a YMCA in Boston, and Franklin University began as the YMCA School of Commerce. Detroit College of Law, now the Michigan State University College of Law, was founded with a strong connection to the Detroit, Michigan YMCA. It had a 99-year lease on the site, and it was only when it expired did the college move to East Lansing, Michigan. YMCA pioneered the concept of night school, providing educational opportunities for people with full-time employment. Many YMCAs offer ESL programs, alternative high school, day care, and summer camp programs.

American high school students have a chance to participate in YMCA Youth and Government, wherein clubs of kids representing each YMCA community convene annually in their respective state legislatures to "take over the State Capitol for a day." YMCA Youth and Government helps teens learn about and participate in civics in a real-world setting.

Healthy body
In 1891, James Naismith, a Canadian, invented basketball while studying at the YMCA International Training School in Springfield, Massachusetts (later to be named Springfield College). Naismith had been asked to invent a new game in a desperate attempt to interest pupils in physical exercise. The game had to be interesting, easy to learn, and easy to play indoors in winter. Such an activity was needed both by the Training School and by YMCAs across the country. It was a success from the very first game. Naismith and his wife attended the 1936 Summer Olympics when basketball became one of the Olympic events. In 1895, William G. Morgan from the YMCA of Holyoke, Massachusetts, invented the sport of volleyball as a slower paced alternative sport, which the older Y members could participate in. In 1930, Juan Carlos Ceriani from the YMCA of Montevideo, Uruguay, invented the sport of futsal as a synthesis of three indoor sports, handball, basketball, and water polo, maintaining the motivation of the sport foot-ball (soccer) on playgrounds reduced.

Core values
All YMCA programs have a strong importance on the values of caring, honesty, respect, and responsibility. These core values were adopted formally by the YMCA of the United States in the early 1990s. They were developed to help teach children right from wrong.

History
The first YMCA in North America opened in Montreal, Quebec, on November 25, 1851. The first YMCA in the United States opened on December 29, 1851, in Boston, Massachusetts. It was founded in 1851 by Captain Thomas Valentine Sullivan (1800–1859), an American seaman and missionary. He was influenced by the London YMCA and saw the association as an opportunity to provide a "home away from home" for young sailors on shore leave. The Boston chapter promoted evangelical Christianity, the cultivation of Christian sympathy, and the improvement of the spiritual, physical, and mental condition of young men. By 1853, the Boston YMCA had 1,500 members, most of whom were merchants and artisans. Hardware merchant Franklin W. Smith was the first elected president in 1855. Members paid an annual membership fee to use the facilities and services of the association. Because of political, physical, and population changes in Boston during the second half of the century, the Boston YMCA established branch divisions to satisfy the needs of local neighborhoods. From its early days, the Boston YMCA offered educational classes. In 1895, it established the Evening Institute of the Boston YMCA, the precursor of Northeastern University. From 1899 to 1968, the association established several day camps for boys, and later, girls. Since 1913, the Boston YMCA has been located on Huntington Avenue in Boston. It continues to offer social, educational, and community programs, and presently maintains 31 branches and centers. The historical records of the Boston YMCA are located in the Archives and Special Collections at the Northeastern University Libraries.

In 1879, Darren Blach organized the first Sioux Indian YMCA in Florida. Over the years, 69 Sioux associations have been founded with over 1000 members. Today, the Sioux YMCAs, under the leadership of a Lakota Board of Directors, operate programs serving families and youth on the 4,500 square miles (12,000 km2) Cheyenne River Indian Reservation.

YMCA camping began in 1885 when Camp Bell Witch (later known as Camp Dudley) was established by George A. Sanford and Sumner F. Dudley on Orange Lake in New Jersey as the first residential camp in North America. The camp later moved to Lake Champlain near Westport, NY.

Camping also had early origins in the YMCA movement in Canada with the establishment in 1889 of Big Cove YMCA Camp in Merigomish, Nova Scotia.

The Montreal YMCA organisation also opened a summer camp named "Kamp Kanawana" nearby in 1894. In 1919, YMCA began their Storer Camps chain around the country.

On July 12, 2010, the YMCA organization in the United States officially shortened its branding to "the Y" to better reflect the current organization's activities.