It could be argued that a political orientation that favors social progress by reform and changing laws rather than by revolution is called "liberalism," although it should be noted that some extreme liberals can be in favor of revolution as well.
i think it is c. second half of the 18th century hope it helps
Because the art reflects what was going on in that era
On this day in 1939, in response to Hitler’s invasion of Poland, Britain and France, both allies of the overrun nation declare war on Germany.