The Need and Importance of Unity
It is said that: "United we stand; divided we fall". It is also said that: "Two heads are better than one". Where those two heads are focused on one common cause or goal, no statement can be more true. Except, of course, billions of heads are better than one, or "the more heads, the better".
Social means to advocate a groupe of men (or women) or a society of men for one common cause. Social is the root-word of the word socialize, which means to communicate. Common is the root word of the words community, communication and communion; all of which possess a suffix preceded by "uni" which is the prefix of the word unity.
All of the above words, prefix & suffix find their roots in Latin Linguistics. The prefix "uni", in English, means: one. In Latin, ūnus means: one; "uni" being its English derivative. The prefix "com" also comes from the Latin and means: Together; jointly. In Latin, "com" means: with. Social, again, derived from the Latin: "socius", which means: [com]panion (companion). Another word, which is both important & applicable here, is as [soci]ate (associate), which means: To join or connect in relationship; or in the mind or imagination.