Primordial/Mythical Age: 1969, DARPA strings together two computers and makes them talk.
Stone Age: The 1970s. Unix and timesharing systems are invented.
Bronze Age: Late 1970s to early 1980s. Usenet is invented. Internet access is limited to universites.
Iron Age: 1982: RFC822 formalizes email. 1984: The internet settles on IP. 1988: Morris worm.
Classical/Antiquity: 1991: Al Gore allows commercial businesses on the Internet. 1993: Mosaic makes the World Wide Web look better.
Medieval: The late 1990s. The WWW and dial-up access causes a mass migration from BBSes to the Internet. Netscape vs. IE. Cookies, Java, Javascript, and Shockwave allow websites to be interactive. Ends with the dot-com bust.
Renaissance/Enlightenment: 2000-2006. The Internet recovers from the dot-com bust. A few popular websites stand out above the rest.
The Fall: 2007 to 2012. Every major website is quietly hijacked by government agencies.
Hellscape: 2012 to present. Governments control online narratives as much as they can and start knocking out websites they don't control to keep people on controlled platforms.