Following the events of January 6, 2021, talk of vigilantes and mob violence have become a part of our daily discourse, reminding us that we haven't come as far as we thought from the "wild" days of the Old West. The nineteenth century was a time of opportunity in the West, but it was also fraught with lawlessness, racism, and extreme violence as territories became states, freemen and immigrants settled alongside white homesteaders, and the first...