John Hancock — And Much Of Corporate America — Thrived During The Pandemic. Here’s Why.

For the better part of two years, Marianne Harrison has been running one of the country’ s biggest life insurance companies from her South End condo. During the throes of the pandemic, Harrison, who is chief executive of John Hancock, tried to return to her corner office in a Back Bay tower but could never get herself to stay a full day. There were only two other folks on…