How has the connotative meaning of “swagger” changed across centuries

I don't really know why this would be a question related to school but either way I need to be taking this class.

Nowadays, the word swag is sort of synonymous with the word cool. People didn't really start using it in that way until around 2003, and when it became a definitive Thing in 2010.

Prior to this, however, the word swag was just used as a way to describe how someone walks. No, literally; the earliest recordings of the word came from William Shakespeare in a Midsummer Night's Dream. The official definition around the late sixteenth century was "to strut in a defiant or insolent manner," or sometimes as ways to describe how inept that a person was.

Strangely, its meaning got somehow lost a little while back, with a lot of people wondering where exactly this word came from since, surely, the creator of it wasn't Jay-Z or Will.i.am, right?

Dig more into it if you actually want to know. Simply, it was just how a person presented themselves; not that different to how it's used now.

a)   it explains that many people died because medicines and medical practices were not effective.