Funny how the Indus Valley civilization was collapsing at this time, considering how ancient it was. IIRC, it started around 3500 BCE. Which still isn't the oldest civilization. That honor goes to the Mesopotamians (as far as we know).
Another fun thought is how many nomads, hunter-gatherers, and pastoralists still existed at this time. For all we talk about the rise of civilization starting around 6,000 to 8,000 years ago (and really kicking in around 3,000 to 5,000 years ago), the cold fact is that large organized civilizations weren't actually "common" at this time. We talk about the Egyptians and the Assyrians and the Mycenaeans and the Olmecs and the Shang Chinese, but never really outside of those and others. And that's because most humans still lived as we did in prehistoric times. In many cases even in these major ancient civilizations, the average peasant lived a life largely unchanged from prehistoric times. Sure, the population wasn't very big anyway, but we were still spread far throughout the world, and if you threw a dart at any landmass, chances are you would come across still-Stone Age human societies.
You could still find Stone Age societies in plenty parts of the world as late as the 1800s, though it's not politically correct to consider them such and the definition of what qualifies as "Stone Age" is contentious— some think that people have to be living in caves and using flinthead spears in purely hunter-gatherer tribes, while others say pastoralism and limited horticulture still qualifies as Stone Age (hence "Neolithic"). Nowadays, the number of "Stone Age" peoples can be measured in the thousands. In that time, I'm sure plenty of people were aware of "modern" hunter-gatherers and pastoralists, but wrote them off as being racially inferior because of their lifestyle. I'm sure of it because that's exactly what happened often. Hell, that was one of the justifications for the ethnic cleansing of the Native Americans
My point being, people have a tendency to assume that the whole world follows the apex, that technology spreads everywhere equally once it's created & distributed (hence the William Gibson quote smacking that delusion down). If civilization was a thing in 5,000 BC, then that means all humans in all parts of the world transitioned from hunter-gatherer lifestyles into using bronze tools and never looked back. We're living in a civilized country now and aspects of Western civilization are spread throughout the whole world, and we learn about paleolithic & neolithic lifestyles only in history books that stop mentioning them alongside the rise of the Sumerians & the Fertile Crescent; ergo, no Stone Age peoples still exist.
Even if you push it back to 1300 BC, you'd probably come across people who can't accept the idea most humans were still living in the Stone Age "because the Egyptians and Chinese were there."