As a species yes, but is that all "humanity" is?
As a whole? Yes, we're primarily bodies, animals. That's what we all have in common, all together. And that's where it stops. Everything that comes after, all the values and such, are splintered among the cultures as we all weigh them differently. I just don't think it's enough to be able to conclude that "Humanity as a whole strives for well-being." Yet. As you write, cultures are overlapping more and more, which is a shame. There are positives to it, but in my ideal world, we would have many cultures that get along with each other. But that's an utopia.