The Genealogy of Neckwear

Today, neckties and scarves can be seen in a variety of textures and styles. As shown above, men's neckwear has shifted to more military styling. The scarf above is a contemporary design from Diesel. I believe that this is due to our relations with the middle-east. Urban styles of neckwear mimic the Arab Shermagh Scarf as a way to summon in peace. 

The bow-tie was a result of the need for a simpler "four-in-hand" knot tie. The bow tie became popular at formal events and "black tie" affairs. Even today, it is known as a formal version of men's neckwear. This photo of a bow tie was taken by PJ McNally.

The "four in hand" knot was introduced during the Industrial Revolution. When men needed neckwear that would last throughout the work day. The necktie above was photographed by Keith Brown.  

The "Incroyables" were a group of fashion forward men living in France after the French Revolution. They were infatuated with luxury. This included cravats and neckcloths. The art piece above is "Les Modernes Incroyables", a satire on male fashions from Caricatures Parisiennes, 1810.

In 1660, the Croatian soldiers of the Ottoman Empire visited Paris, France. King Louis XIV soon adopted this style and made them adornment for royalty. (Royal Cravat, derived from "Croat"). The photograph above is Louis XIV, Paris : Éditions France-Empire, 1958, by Jean de La Varende.

Sources include drjays.com, tranism.com, surplusandadventure.com, and wikipedia.