Here’s a fact: Most of your working life will probably happen after your twenties. You’ll most likely still have more than half left to go after your thirties.

And yet there’s this overwhelming sense that you have to predict exactly …

I was a partner in the UK when I first became pregnant. In an attempt to retain more female partners, the firm had just introduced a great new maternity policy—paid time off for six months.

I was delighted. It took …