Biplanes (and triplanes) became (nearly) extinct not because high strength materials (like composites) were not available, but because they became available.
One of the major reasons for use of biplanes in the early days of aviation was that the materials available were of insufficient strength for the (wing) designs used.
The major disadvantage of biplanes (or triplanes) is aerodynamic- it produces a lot of drag compared to the monoplane and the wings interfere with each other.
So, the biplane was an (aerodynamically) inefficient solution to a structural problem. As higher strength materials like Aluminum became widespread, the biplanes fell out of favor.
While they <em>can</em> be revived, I don't see why someone would do that, except for nostalgia (or some special uses, like aerobatics).
There are some companies who manufacture or restore biplanes, but they usually don't use (modern materials like) composites, though modern avionics are used.
The difference is that they had many more rules
The crops changed to vegetables and milk. They were sold to the northerners.
The North used the cotton to make dress factories in the north. There were no more sales on tobacco exported to differeing countries.Connections with countries that sold slaves were broken.
Thucydides viewed war and politics as being inherently intertwined, since he believed that war was simply the means that humans resorted to when political discussions failed.