Dan Dennett 2: Dangerous memes

Dan Dennett at TED2002
Dangerous memes  (transcript)
Summary
Again, l regret that I've chosen his(the speaker's) article and never read his books before. I think that counting reading his articles is understanding them easily, however, l feel that it's getting more and more difficult to understand.
He told about the meme at the end of the previous story and said to audiences something with him. It's that every time you read it or say it, you make another copy in your brain.
It must be spreading memes.
A meme is an idea, behavior, or style that spreads from person to person within a culture.  It's not through genes but through writing, speech, gestures, rituals, or other imitable phenomena with a mimicked theme. And then it's getting infectious.
Something in your mind influences outside. Education, religion, and ideas are not being passed on genetically but live on as memes. There are a lot of toxic ideas among all ideas.  When toxic ideas spread as memes like germs, they can wipe out cultures or traditions or practices. Although some people might have an immunity, many people in the world don't have. It's a big deal and dangerous.           
The speaker tells us to get the facts without emotion to stop bad memes.

Words in this story
imitable
infectious /adj/   infection /noun/ the process of infecting or the state of being infected.
influence /verb/  affect  influence /noun/  effect, impact,
hence /adv/  consequently
unleash /verb/ release from a leash or restraint.