If we know more why don’t people act like it?

So last time I posted on the blog, I talked about how we know a lot more this year.  We’ve learned so much more about bilingualism and the positive effects of bilingualism on children’s learning on preservation of language capabilities for people as they age. At the time I wrote that I was feeling rather pessimistic but I ended up writing a post that was optimistic.  So today I’m going to touch on the pessimistic side.