The relationship era began in the early 20th century with the rise of modern dating practices and the shift towards more individual choice in selecting partners. This era marked a departure from traditional arranged marriages and gave individuals more agency in their romantic relationships.
The Great Depression.
The era of television politics began with John F. Kennedy.
The electronic community began to take shape in the late 20th century with the rise of the internet and personal computers. It gained widespread adoption in the 1990s as more people began to connect and communicate online through emails, chat rooms, and forums. This marked the beginning of a digital era that continues to evolve with advancements in technology and social media platforms.
Mesozoic era
no one knows
It was early Mesozoic era
There is no change in significance before or after.
Yes, parties began holding public nominatiions in the Jacksonian era
patents and copyrights
The Paleozoic era began about 543 million years ago. It came after the Precambrian era and before the Mesozoic era.
The NHL's modern era began in 1992.