Okay, so I realize I'm jumping in at a bad spot, but... did you read what he said?
Race effects environmental factors, which results in developmental differences. He's implying that being something other than white will result in racial discrimination playing a role in your environmental development, which accounts for 20%-50% of the end result of your personhood.
What he's saying is that being discriminated against creates a hostile environment that effects your development resulting in worse test scores.
Or are you going to tell me that super rich school districts having higher test scores than somewhere in Alabama's black belt is purely coincidental and has nothing to do with systemic discrimination based on race?
Again, no disrespect, but I would advise you to visit the library or at least browse through this thread, where people have posted links.
I'm African American. My ancestors were stolen and forced into slavery. I could go into a spiel about economics, equity, and opportunity but I will just say that Ruby Bridges, the first Black person to ever enter a desegregated school is 62 years old.
It's one thing to recognize racial discrimination. It's another thing to say, intelligence is innate and unchangeable. Murray's main sources, that are linked in OP are from a white supremacist who praised Apartheid.
Sam Harris, mostly agreed with Murray. In this interview, Sam is no different than an Obama Birther, he's on that level of intellect if he's going to humor Murray and not really challenge him. Sam could have invited on any Black historian, scientist, or even a Black HS teenager to tell him about the bell curve and why it's baseless.
So, I will give you one chance to explain to me, how my intellect and overall growth potential is limited, not by environmental factors and systematic racism, but because I'm Black. You are telling me, that I'm subscribing to outrage porn when I know who Sam is interviewing, I know the history of my ancestors, I listened to a bit of a podcast, and I'm not happy.
I'm not happy when fake progressive thinkers that continue to give a platform supporting racism. I'm sick of Sam's Islamaphobia, which is well documented. I'm sick of talking about IQ's and how I don't have the capacity for intelligence that white people. I'm sick of Sam and Bill Maher and Dawkins and the like, that normalize racism, and think they know better than people who live it every day.
From what I listened to, Harris was comparable to Wendy Williams, except Wendy digs for answers and knows about her guests. Harris had so many opportunities to confront Murray and he didn't. Either because know (which is unacceptable, considering this is not a new topic) or he agrees with him (and he did agree, on many points).