Second Congo War.

We seem to pay attention to wars based on how politically important they are rather than how objectively bad they are. I just took a look at the wikipedia page on the Second Congo War. It was in fact the war that killed the most people of any since World War Two, and judging by the lingering chaos may as well still be going although it officially ended in 2003. I had known this for a long time, but even knowing that I had never really read up on it. Looking at the Wikipedia page is pretty disturbing. It includes such quotes as:

"During the war, Pygmies were hunted down like game animals and eaten. Both sides of the war regarded them as "subhuman" and some say their flesh can confer magical powers."

It really is amazing to me how so many people fixate on minor atrocities such as those in Israel, while completely ignoring much worse ones.

Looking at the wikipedia list of wars in order of how deadly they are is rather interesting. It seems to be full of conflicts that I have never heard of despite how many millions whose lives they altered. China in particular has a pretty crazy history.