We take it as a given that Americans are politically polarized, but how do we actually know if empirically this is the case? We talk with Prof. Patrick Egan (NYU) about how we can quantify something as abstract as a political attitude, why doing so helps us understand polarization, and how all of this helps reveal opportunities where we can make progress on areas where we're most divided -- such as climate change.

Is democracy in decline around the world? This is a major question on many of our minds, and luckily for us there are very smart, thoughtful people working on tracking (as well as explaining, understanding, and predicting!) exactly this. We are joined by professor Brigitte Seim, who is a project manager for the Varieties of Democracy (V-Dem) dataset, which is one of the biggest and most elaborate efforts to track democracy around the world to date. We discuss how to think about turning something as abstract and unwieldy as "democracy" into a number, how to make sense of and learn from those numbers, and about her own research on the growing importance of measuring toxic political speech online to understanding the health of democracy.

Approximately ten billion different narratives about what happened in the recent US presidential election have emerged since said election. But how many of these narratives can be substantiated by data? How can we tell?

Political scientist Seth Masket joins us to discuss how to make thoughtful inferences from this data, how and why to be skeptical of evidence-free opinions, and the importance (just like in the last episode!!) of being thoughtful about whether our narratives are based on data or we (or others who are trying to persuade us of something) are simply trying to pick data to support our narrative(s). Stick around until the end to hear how polls did and Seth's thoughts on why everything feels so politically bad these days.

Crime data is all over the news these days and, at least in the United States, it seems like you can tell any story you want to about whether crime is going up or down and whose fault it is. How should we be thinking about this data to figure out of what's really going on? We speak with Jeff Asher, crime data analyst and co-founder of JH Datalytics, which recently launched the Real-Time Crime Index, about where crime data comes from, why everyone seems to be disagreeing about it, and how to think and talk about it more clearly.

Political polls are in our faces these days whether we want them or not -- especially if you're in the US during election season. We talk with polling expert and database journalist Dhrumil Mehta of Columbia University (formerly Nate Silver's FiveThirtyEight) about how to think about polls. Are they all just noise? Do they tell the future? Something in the middle? Join us to explore where political polls come from, how to evaluate them, and how to make the most of the information they offer.