One of the reasons humans are so resilient is our ability to mold our behavior to ever changing situations. It wasn't so long ago that many of us hugged when we met. In the middle of a pandemic, in which close contact between people can help spread a deadly virus, we now stand (often awkwardly) two meters apart. This is just one example of our ability to adapt to changing circumstances that can otherwise be harmful. This capacity to cope and respond flexibly to unpredictable changes in our environment has shaped our evolution.