That is an apt observation. But I would say that more than actual historical events happening, it's our propensity to attribute historicity(knowingly/unknowingly) to events, that has increased. That is because of several reasons -

• The biggest would be the phenomenal advancements in information technology that enables one to gauge not only local, but global context and impact of an event. This was not possible before, even though it actually did. For e.g. the Bubonic plague that originated in Asia, travelled to Europe and was a significant factor behind colonialism of particularly, Latin America.

• Globalization and Multiculturalism has also led to a variety of commentators interpreting the same event and inferring how it affects them. This keeps the conversation alive for a longer period of time. An example could be Syrian refugee crisis.

• Media sensationalism in this era of consumerism has also contributed in making non-events eventful and even if something doesn't have a historic impact, sometimes an overzealous reporting leads to creation of one.