To be specific: a generalist, as I’m defining one here, is a person who moves their attention fluidly across the spectrum of culture, rather than settling it into a fixed position. Usually, this means working, thinking, and acting in multiple fields of interest.
We have names for this person: the polymath, the Renaissance man, the universal human, the hyphenate, the interdisciplinarian. If we meet someone who does multiplex things, we need to use one of these words to denote this person’s unusual and unlikely behavior. They are an exception to the rule of specialism. If a generalist is successful, we regard them with alarm, unsure how someone arrives at such a life. If a generalist is unsuccessful, we might knowingly cluck at their foolish attempt to go against the grain. For these people, we use other terms, like dilettante or jack-of-all-trades—two descriptors that no generalist appreciates. That person is just another “jack-of-all-trades, master of none!” we say. But did we know that some scholars believe this line, written by Robert Greene about Shakespeare—a playwright, poet, actor—was also followed by the couplet “but oftentimes better than a master of one”? (I use “we” here because even I, as a generalist, am subject to prejudices against generalists.) We just plain dislike the notion that someone can be too many things. That would be unfair. You get one.