HIS213H5: A History of the Present

It looks like an outdated site, but it gives you an overview.

It offers in-depth articles on each topic.
Check Climate Change Conspiracy Theories as an example.

To take advantage of OED, take a look at the Video guides
Entries in the OED are supported by quotation evidence with real examples of words in use shown throughout the written record.
The primary function of OED quotations is to illustrate the way a word or sense is used through its history from its earliest use to the present day or, in the case of obsolete words and senses, the last period during which it was in use.
As an example, when you visit UFO, you see where the words appeared in the past.