History
Unlike Geography and politics this is the skill that enables a character to be acquainted with younger as well as half forgotten history. Some will question why anyone in the post nuclear wasteland should be familiar with say, the history of Ptolemaic Egypt – I will refrain from the cliché that says that there is no useless knowledge and will instead point to the riches an intelligent scavenger will gather in a derelict Vault, if he knows, from studying history, where to find one.
Bonuses and handicaps – similar to geography and politics – for distance in time and also for notoriety of the epoch in question.
The starting value is: 20 + 2 * I