It is really hard to understand Occupy Wall Street if you never heard of the French Revolution. It is equally unlikely to appreciate Jackson Pollock if you are not familiar with Kandinsky and the other expressionists. You may even occur in the same mistake of the critic Robert Coates, who once mocked a number of Pollock’s works as “mere unorganized explosions of random energy, and therefore meaningless”.
All in all, however, you don’t need to be a historian or an art critic in order to decrypt the reality around you. There is a more general rule you can always apply: the world can be divided in two big categories – people who have a certain sense of humour, and those who take themselves too seriously.
You can understand the relationship between the Islamic State and Pegida, via Nigel Farage, if you bear in mind this distinction.