It's a cliche to say it, but I will anyway: "The more things change, the more they stay the same." Still, there is much truth in it.
The reason is that people are the same throughout the ages. They end up having the same weaknesses. Some are power-hungry. Others are vengeful. Occasionally, people are treacherous. You get the idea. That was true 3,000 years ago, and it is true today.
William Shakespeare, possibly the greatest playwright ever, captured such characters and how they behave in various scenarios. His plays are as relevant today as they were when he wrote them, possibly more so.
That's why you should read some of them. Or failing that, maybe watch a movie, go to the theater, or listen to a recording of the plays. Documentary maker Michael McKinley explains his thoughts in this video.