It's estimated that about 100 billion humans have ever lived.[1]
As a fraction of population to have ever existed, more people are alive now then at any point in history - i.e. 8% of all the humans to have ever existed being alive right now is kind of wild.
To play devils advocate, there was some point in time where the first modern humans were all alive. That would’ve been brief and may be essentially impossible to define but if you were to determine a cutoff point for the 100bn (or so) that means there was a first group.
Equally interesting is that we may be getting closer to "peak population".
I don't think we are quiet there yet, but there is evidence that the rate of growth is slowing, and in some places there may be population decline. If that trend continues then we may level off, perhaps even slowly decine.
Barring a major event (like a global pandemic which seems unlikely :) I don't think we see drastic decline. Climate Change though may affect things, although that will happen slowly and humans are very mobile, and adaptable.
As a fraction of population to have ever existed, more people are alive now then at any point in history - i.e. 8% of all the humans to have ever existed being alive right now is kind of wild.
[1] https://en.wikipedia.org/wiki/Estimates_of_historical_world_...