10,000 Years Ago
understanding others was pretty simple. Maybe not easy, but the number of people in your social circle was small, they pretty much all looked like you, believed what you believed, and saw the world pretty similarly.
1000 Years Ago
we were living in cities, towns and villages, we travelled a bit, and occasionally we ran into people from other parts of the world, but rarely interacted with more than a curiosity in a passing traveller. Life was still relatively simple, and the people we needed to interact with to live our lives and solve society's problems were pretty similar to ourselves.
100 years ago
the pressures on our ability to understand each other began to increase rapidly. large scale global migration happened in a single generation, cities were becoming melting pots of cultures and ideas. There was a lot to gain, but also far more to understand than ever before. Still, the solutions to problems we faced as societies almost always resided locally or regionally.
It has never been more likely that your neighborslook, think, and see the world very differently than you. We are also facing global challenges that require coordinated, collaborative, global solutions. There has never been a time that we have needed to understand each other more than today, and at the same time there has never been so much to understand.