Titles also include headlines, sometimes called titles at magazines. Some publications, perhaps to avoid the need to their copy editors to know grammar, capitalize the first letter of every word in a title and a headline. Some publications will also capitalize a title when it stands alone but refers to a specific person, while others will lowercase any title standing alone. Philosophies are lowercased, unless they are derived from a proper noun. The Democratic Socialist used to be a Communist, but she distinguishes her brand of socialism from that of the Social Democrats.
Dictionaries differ, as do style books.
Plural generics are lowercased, even when referring to specific places. But what constitutes a traditional historical period varies. Minimalism, pointillism Games are capitalized only if the name is a trademark. Books spell out numbers below 101, round numbers, and isolated numbers in text. But some publications spell out ten, others use 10.