Popper's philosophy of science represents a radical departure from alm
ost all other views about Knowledge. This helps account for serious mi
sunderstandings of it among admirers no less than among adversaries. T
he view that knowledge has and needs no foundations is counterintuitiv
e and apparently relativistic. But Popper's fallibilism is in fact a f
ar cry from antirealism. Similarly, Popper's social and political phil
osophy although seemingly conservative in practice, can be quite radic
al in theory. And while Popper was an ardent democrat, his reasons for
supporting democracy were so unusual that they may escape the problem
posed for democratic theory by the political ignorance of the demos.