He was the main ally of Teddy Roosevelt against his own party, mainly the classical liberals, or the conservative wing. By today's standards, Teddy Roosevelt was the John McCain, while William Howard Taft was the traditionalist like Sarah Palin (although it's not actually fair to compare Taft with Palin, but for this example it's fitting).
The following are some of the things Beveridge helped make possible for the progressives:
- Reform of the meat packing industry (with the help of Upton Sinclair's The Jungle) by the passage of the Federal Meat Inspection Act of 1906
- Child labor laws
- 8 hour work day
- The special interests
- Railroad magnates
It's should also be noted he was a Republican from Indiana, a historian, and the keynote speaker for the progressive party when Roosevelt ran for President in 1912.
He served as Senator from 1899 to 1911. He ran for the senate one more time in 1922 and lost, and dedicated the rest of his life to writing literature. He actually won the Pulitzer prize for his book, "The Life of John Marshal."