Globalization is actually about a lot more than just economics. It's also about cultural exchange, ecological exchange, migration and pretty much any other kind of large-scale exchange. Polish workers coming to Norway is globalization, but so is the silk road, or Arian invaders in India, or christian missionary's converting native Americans, or even syphilis.
That's the beauty of the subject, it's very broad so you can go a lot of ways when writing an essay like this.