At that period in time. McDonnell Douglas was in a heep of trouble and wouldn't have lasted much longer (in terms of civil aviation) they would have gone all military like Lockheed is now. They just couldn't compete with Boeing and Airbus.
So Boeing bought them while they were weak mainly to take there military technology, but also to eliminate one of there competitors.
I sure miss McDonnell Douglas.....
"Generosity is giving more than you can, and pride is taking less than you need." - Khalil Gibran