Apart from Locke, the other main philosophers who are generally termed Empiricists are:

1. Bishop George Berkeley (1685-1783), an Irish philosopher and clergyman, is considered the founder of Idealism, a view which sees ideas as the only reality.

2. David Hume (1711-1776), Scottish philosopher, a modern sceptical philosopher who was to influence the twentieth century logical positivist movement (amongst others).

Though these three philosophers differed in the actual details of their philosophies, they were all pretty much in agreement in their opposition to the principles of Rationalism. We will now deal with these one by one.