Socialism - the word invented in the late 1810s, communism - the word first appeared in 1840. None of these things were words, much less ideologies before the French Revolution and the French revolution gives birth to much of the modern political world. Have you not wondered why we refer to the political left, and the political right? Does this have any inherent bodily signification? No. Left and right in politics comes from the original designation of the Deputies who sat to the Left of the speaker’s, podium and those who sat to the right of the speaker’s podium in the National assembly of 1789-1790. The left were those who were seen as progressive wanting to change, the right were seen as those wanting to conserve elements of the old regime.
Socialism and communism are the words invented in the 19th century, they are political ideologies originated from the French Revolution. Additionally, it also comprises that political left and the political right do not have any inherent bodily signification, the left was those who were seen as progressives intend to change, the right was seen as those want to conserve elements of the old regime.