More of a realist

When did being called a 'realist' start to mean that one is a pessimist?

Sometimes, people with small goals call themselves realists, and dismiss those around them as merely dreamers. I think this is backwards.

"I guess I'm more of a realist than you," actually means, "I guess I've discovered that a positive attitude, a generous posture and a bit of persistence makes things better than most people expect."

Hope isn't a strategy, but it is an awfully good tactic.