The makeup of state legislatures will be reconfigured after the Nov. 8 mid-term election, with a portion of the lawmakers included in the database leaving office. But the data shed light on structural barriers that have led to the long-term underrepresentation of large swathes of the US public in state government.

Here’s a look at Americans whose voices are not as loud as warranted by the size of their population:

Why are so many US lawmakers lawyers?

In Texas, only about 1% of the working population holds a job as lawyer or judge, but over 30% of the state’s legislators were in a legal profession prior to taking office. While the state is an extreme case, the pattern holds true across the country.

This phenomenon is unique to the US. “In the vast majority of democracies, if you look at their national legislatures, it’s not overwhelmingly attorneys,” says Carnes.

So why is it so in the US? Lawyers have extensive networks of wealthy individuals, which they can tap for campaign funds. And compared to other professions, it’s relatively easy for them to put their jobs on hold in order to run for office.

Overall, the lack of working-class professionals in government comes down to lack of time, job stability, and fundraising networks. Working-class jobs can be less stable, and taking off time to campaign could mean the candidate has no job to come back to if the run for office fails.

Where are the women in state legislatures?

The need for better representation goes far beyond profession. In nearly every state, women are also significantly underrepresented. Only one has a greater proportion of women in the legislature than in its population: Nevada, which has 37 women lawmakers and 26 men.

Ethnic and racial minorities don’t have enough seats

Ethnic and racial minorities are also underrepresented in every state except one. In Indiana, where Hispanics make up less than 8% of the general population, they hold 25% of the seats in the state house.

But in the rest of the country, these minorities account for a smaller share of the legislature than of the population. This includes people who are white, but identify as Hispanic.

How do you increase representation in state legislatures?

While it’s clear that poor representation is a problem for democracy, fixing it is difficult, says David Moscrop, a political theorist and author of the book Too Dumb for Democracy?

“The question is, what kind of representational diversity do we want?” he says, noting that most governments already have geographic representation built in. “Where do you go beyond that? And then you get into the tricky questions.”

Effective representation doesn’t necessarily mean a legislature whose makeup exactly mirrors the general population. Representation should be substantive, instead of just symbolic, he says, and that might mean more of a focus on equity. For example, if women are more impacted by a policy than men, should female lawmakers have a more impactful vote on the matter?

Another tricky question: How do you get candidates from marginalized groups into government? And should the solution come from governments themselves, through quotas for lawmakers with underrepresented backgrounds? Or should political parties and civil society devote extra resources, such as free child care or grants, to help them run and win?

“It’s not a given that it’s something we can do easily, and it’s not obvious what the best way to do it is,” says Moscrop.

First, though, Americans need to better understand their politicians’ backgrounds and identities, and the role that plays in the decisions they make. Carnes and his team plan to continue updating their database as new lawmakers get elected.

“Citizens deserve to know who is representing them, and often it’s hard to even just find that information,” he says.

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