Could the pressure from mobile, and the internal tensions, tear Wikipedia apart? A world without it seems unimaginable, but consider the fate of other online communities. Founded in 1985, at the dawn of the Internet, the Well, the self-proclaimed “birthplace of the online community movement,” hosted an influential cast of dot-com luminaries on its electronic bulletin board discussion forums. By 1995, it was in steep decline, and today it is a shell of its former self. Blogging, celebrated a decade ago as pioneering an exciting new form of personal writing, has decreased significantly in the social-media age.

These are existential challenges, but they can still be addressed. There is no other significant alternative to Wikipedia, and good will toward the project — a remarkable feat of altruism — could hardly be higher. If the foundation needed more donations, it could surely raise them.

The real challenges for Wikipedia are to resolve the governance disputes — the tensions among foundation employees, longtime editors trying to protect their prerogatives, and new volunteers trying to break in — and to design a mobile-oriented editing environment. One board member, María Sefidari, warned that “some communities have become so change-resistant and innovation-averse” that they risk staying “stuck in 2006 while the rest of the Internet is thinking about 2020 and the next three billion users.”

For the last few years, the Smithsonian Institution, the National Archives and other world-class institutions, libraries and museums have collaborated with Wikipedia’s volunteers to improve accuracy, quality of references and depth of multimedia on article pages. This movement dates from 2010, when the British Museum saw that Wikipedia’s visitor traffic to articles about its artifacts was five times greater than that of the museum’s own website. Grasping the power of Wikipedia to amplify its reach, the museum invited a Wikipedia editor to work with its curatorial staff. Since then, similar parternships have been set up with groups like the Cochrane Collaboration, a nonprofit organization that focuses on evidence-based health care, and the Centers for Disease Control and Prevention.

These are vital opportunities for Wikipedia to tap external expertise and enlarge its base of editors. It is also the most promising way to solve the considerable and often-noted gender gap among Wikipedia editors; in 2011, less than 15 percent were women.

The worst scenario is an end to Wikipedia, not with a bang but with a whimper: a long, slow decline in participation, accuracy and usefulness that is not quite dramatic enough to jolt the community into making meaningful reforms.

No effort in history has gotten so much information at so little cost into the hands of so many — a feat made all the more remarkable by the absence of profit and owners. In an age of Internet giants, this most selfless of websites is worth saving.