This evergreen history article uses authoritative archives and official records. Exact dates are used when documented; gradual inventions and rollouts are described as periods rather than being assigned a misleading single birthday.
Quick facts
- Social interaction existed on computer networks before the Web through bulletin-board systems, Usenet, chat and online services.
- GeoCities, launched in 1994, let users build personal pages around themed online neighbourhoods.
- SixDegrees, launched in 1997, combined profiles, friend lists and network browsing in a recognisably modern form.
- Facebook launched at Harvard University in February 2004.
- Mobile cameras, app stores and recommendation algorithms shifted social media from friend updates toward visual, short-form and creator-led entertainment.
Communities before modern social networks
Early time-sharing systems allowed users to exchange messages. Bulletin-board systems in the 1970s and 1980s hosted local communities through dial-up connections. Usenet, created in 1979, organised public discussion into newsgroups. Commercial services such as CompuServe and AOL combined messaging, forums and profiles.
These systems established social norms—moderation, usernames, reputation, flame wars and community identity—long before the phrase “social media” became common.
The personal-homepage era
The Web made public self-publishing easier. GeoCities began in 1994 and organised member pages into themed neighbourhoods. Users learned HTML, added guestbooks and connected through web rings. Personal sites were expressive but fragmented; discovering friends and updates still required manual browsing.
Profiles and friend networks
SixDegrees launched in 1997 and is often cited as an early social-networking service because it joined personal profiles, visible friend lists and network exploration. Later services refined different parts of the model.
Friendster grew rapidly after 2002 but struggled with performance and user expectations. LinkedIn launched in 2003 with a professional identity focus. MySpace, also founded in 2003, became a cultural centre for music, custom profiles and youth communities.
Facebook and the real-identity network
Facebook launched at Harvard University in Cambridge, Massachusetts, in February 2004 and expanded to other universities before opening more broadly. It emphasised real names, school networks and a clean interface.
The News Feed, introduced in 2006, changed social media from visiting individual profiles to consuming a continuously updated stream. The platform later opened tools to outside developers and advertisers, helping it become a global infrastructure for identity, communication and targeted marketing.
Video, microblogging and visual platforms
YouTube made user-generated video easy in 2005. Twitter launched in 2006 around short public messages and real-time conversation. Tumblr combined blogging and social following. Instagram launched in 2010 with mobile photography and filters, while Snapchat popularised disappearing messages and vertical camera-first communication.
These services shifted social media away from desktop profile pages toward mobile feeds, visual storytelling and live public events.
Algorithms and the attention economy
Chronological feeds were gradually supplemented or replaced by algorithmic ranking. Systems predicted which posts would keep each user engaged. This improved discovery and helped creators reach strangers, but it also intensified competition for attention.
Metrics such as likes, shares, watch time and follower counts influenced behaviour. Advertising models rewarded detailed audience targeting. Critics connected these incentives to polarisation, compulsive use, misinformation and reduced privacy.
TikTok and interest-based discovery
TikTok’s global rise in the late 2010s demonstrated the power of a highly personalised short-video feed. The platform could recommend entertaining clips without requiring users to build a friend network first. Competing platforms responded with Reels, Shorts and similar formats.
The dominant unit of social media became less “a post from someone I know” and more “a piece of content predicted to interest me.”
The creator economy
Social media created new professions: influencers, streamers, educators, newsletter writers, short-video editors and community managers. Revenue comes from advertising, subscriptions, gifts, brand deals, commerce and direct support.
Creators benefit from global distribution but depend on platforms they do not control. Algorithm changes, policy enforcement and account loss can immediately affect income. Successful creators increasingly diversify across platforms and maintain email lists or independent websites.
Governance, safety and the future
Social platforms face difficult decisions about speech, harassment, child safety, privacy, political advertising and synthetic media. Governments have introduced stronger privacy and platform-accountability rules, while companies invest in moderation and transparency.
Future social media will combine AI assistants, generated content, immersive devices, private groups and commerce. Authenticity may become more valuable as synthetic media becomes easier to produce.
Common misconceptions
- Social media did not begin with Facebook.
- A social network and social media are related but not identical; media-sharing and discussion services may not centre on friend graphs.
- Algorithms do not simply show the “best” content; they optimise defined objectives using predictions.
- Viral reach can create income, but it is not stable ownership of an audience.
Timeline: key years and locations
| Year | Location | Milestone | Why it mattered |
|---|---|---|---|
| 1978–1979 | Chicago, USA / Duke and UNC, USA | Bulletin-board systems and Usenet emerge | Create early networked public communities. |
| 1994 | Beverly Hills, California, USA | GeoCities launches | Popularises personal web pages and themed communities. |
| 1997 | New York, USA | SixDegrees launches | Combines profiles and visible social connections. |
| 2002–2003 | United States | Friendster, LinkedIn and MySpace launch | Defines competing social-network models. |
| Feb 2004 | Harvard University, Massachusetts, USA | Facebook launches | Builds a real-identity network that scales globally. |
| 2005–2006 | California, USA | YouTube and Twitter launch | Expands social media into video and real-time public conversation. |
| 2010 | San Francisco, California, USA | Instagram launches | Makes mobile visual sharing central. |
| 2010s | Worldwide | Algorithmic feeds and smartphones dominate | Shifts attention from profiles to ranked content streams. |
| Late 2010s | China and global markets | TikTok expands internationally | Popularises interest-based short-video discovery. |
| 2020s | Worldwide | Creator commerce and generative AI accelerate | Blurs boundaries between audience, media business and synthetic production. |