For many people, work no longer has a clear beginning or end.

What was once contained by physical space and time has become ever-present, reaching into all areas of life. Work now travels with us everywhere we go - on our phones, in our inboxes, at the gym, on planes and trains - enabled by tools that make us reachable at nearly any moment. Even when we’re not actively working, many of us are expending mental energy monitoring messages, anticipating demands, or mentally troubleshooting problems. The boundary between professional and personal life has virtually dissolved.