Former president George W. Bush said this week that he and other famous Bushes had to "earn" their way into politics, and that the family's political dynasty was not helpful in launching careers.

In a CBS News interview that aired on Sunday, Bush told host Bob Schieffer that his mother was wrong to think that there had been enough presidents in their family.

"Sometimes her prognostications haven't been very accurate," the 43rd president of the United States argued. "No, I think you have to earn your way into politics. I don't think that anything is ever given to you."

Bush also observed that his brother, Jeb, might have a tougher time becoming president because the state public discourse had changed.

"In the old days... people were held to account for what they said," he insisted. "In other words, there was a push back. Now, there's just so much stuff out there, flotsam out there, that people say what they feel like saying without any consequence."