If it's the last thing I do I'm gonna change that person!

How much brainpower has been consumed with schemes and dreams around changing other people?

I mean:

• we observe what other people do and say, 
• we assume we know what they are thinking or we choose to believe that's not an important factor,
• we think about how those other people are all wrong, mistaken, and making errors,
• we concoct a vision of their better future, 
• we compare notes with accomplices to make sure we get our arguments airtight, and
• we set about persuading the wrong, mistaken, error-making people how to go about getting their better future.

How much brainpower has been consumed doing that?

I suspect many of us have spent considerable time in that I'm-going-to-change-other-people zone. 

It isn't time well spent, is it?