A few years ago I tried to read almost everything the late philosopher Mortimer J. Adler wrote. Therefore, I was pleasantly surprised that some of his works are currently in archive.org. Mortimer J Alder wrote each of the following 102 essays which reflect 102 great Ideas in Western Civilization. Adler's
Syntopicon is broken into two volumes.
The first volume covers subjects A-L
https://archive.org/details/greatide...37mbp/page/n51
The second volume covers subjects M-W
https://archive.org/details/greatide...31mbp/page/n35