Therefore, since the invention of cloth, and then have the right to centralize the group, there is a flag.
Flags generally refer to patterned cloth hanging on poles. The pattern on the flag is symbolic and used to convey information or classification. Today, flags can also be used for propaganda or pure decoration. Countries, regions, armies and navies usually have their own national flags. Modern national flags or regional flags are generally rectangular, and some national flags use square triangles or irregular pentagons.
Flag (extended meaning) can refer to a kind of spirit, doctrine and belief, that is, the ideological theory that people are willing to believe and use to guide their behavior and the inspiring spiritual power that can guide people to move forward. Marxism is the great banner of the proletariat.
Flag (extended meaning) can refer to someone or something that has a vanguard and exemplary role in a certain field. Example: Premier Zhou is a banner of China's * * * production party.
Flag (extended meaning) can refer to the name a person holds when doing something, just like banner. Nowadays, many charlatans are doing stupid superstitious activities under the banner of science.
Accurately speaking, in fact, human beings should have the conditions to make flags when they invented cloth, and human beings have the demand and willingness to make flags when they are organized and have rights holders.
Flags are only used to express rights and divide territories, which is the original function. Only later it was used more widely.
Then there is a flag when human beings record history, but the manufacturing process was simple at that time. At present, the earliest archaeological site in China is the Xia Dynasty, but before that, the Three Emperors and Five Emperors actually had flags. To be sure, China made flags earlier than foreigners, but foreigners may not have learned them. They also invented their own cloth, and maybe one day they pulled a piece of cloth as a symbol of their territory.