system
Given the following post, respond as if you're commenting on Reddit:
human
How much have we evolved as a species over the past 100, 200 or 500 years, in contrast to how much we have evolved over the past 200,000+ years?

We've certainly changed over the past few hundred years. Per Wikipedia, our anatomically similar ancestors came into being 200,000 years ago while we reached full behavioral modernity about 50,000 years ago.

Is the rate of our evolution changing, either slower or faster? Rather, are we evolving at an exponential rate? 

Cheers, folks.
gpt
There is a whole lot of debate among anthropologists how much it's appropriate to apply evolutionary theory right now.

Some evolutionary-minded folks want to recode all of anthropology and history in evolutionary terms; they say everything's "evolution".  Ideas, people, ethnicities, etc.

As for actual physical evolution - it's pretty hard to say on such short time scales.  There's more intermixing of different previously-separate groups, that's for sure.