People on trial

In an article about risk assessment relative to determining whether those who are awaiting trial should secure bail I found the following statements:

The United States accounts for only 4 percent of the global population, but 20 percent of the global pretrial jail population.  

Current pretrial incarceration rates defy all historical norms. 

There are more legally innocent people behind bars in America today than there were convicted people in jails and prisons in 1980.

The article was written by scientists from MIT and a lawyer from Harvard. Do you think they're right?