"Business Management" went out of fashion during the Great Depression, but has re-emerged as a favorable term now.
A "boss" and hierarchical obedience is needed during a crisis - it is the only practical way to avoid catastrophe.
This reminds me of how dictators were elected in the Roman empire. There needs to be a similar mechanism in business to transition from broader consensus-seeking during normal operation to executive decisions in a crisis.
There is no one right organization structure. Management must seek, develop, and test for the structure that fits the task.
Likewise, there is no one way to manage people. Knowledge workers, by definition, have to know more than their bosses, and thus are associates rather than subordinates. Furthermore, many "employees" today are contractors and vendors.
A manager is like a conductor of an orchestra. His or her job is to lead.
End-uses or even the means of delivery of products are no longer fixed. E.g. beer can be delivered in cans or glass bottles, and other means.
Technologies outside one's field are likely to have the greatest impact. Technologies now run crisscross rather than parallel.
The starting point has to be what customers consider to be value, which is almost always different from what the supplier thinks is value.