Add Yahoo as a preferred source to see more of our stories on Google. Zero-sum thinking, the mentality that one person’s gain must come at the expense of another person’s loss, has dominated business, ...

Zero-sum thinking has spread like a mind virus, from geopolitics to pop culture. Credit...Photo illustration by Pablo Delcan Supported by By Damien Cave Damien covers global affairs. He is based in ...

In our interconnected world, the family dynamic is always evolving. For many, the notion of family expands beyond traditional boundaries to include egg and sperm donors and half-siblings. However, a ...