That's a fascinating thought. Perhaps a slightly more optimistic view is not we are all individuals, but we start to see more and more people as in our tribe?
Perhaps we are more starting to see ourselves as humans?
Yes I also think this is a part of it. As the world becomes more internationalist and multi-cultural, it makes it harder to dehumanise please who we now have the chance to communicate with in an instant, read about, travel to their country etc
One of Hofstede's observations is that developed countries tend to be more individualistic, treating others as individuals rather than in-group or out-group. There are other correlated features on his individualism-collectivism dimension, such as the nature and purpose of education. The paper "Dimensionalizing Cultures" covers this in depth.