Geta was one. another one is Caracalla.
Yes, it is true that in 1947 Japan adopted a new constitution that established a democratic system of government, since the Allies oversaw this transition and wanted to make sure that Japan didn't become violence and imperial again.
Answer:
Declaration of independence
A cure for polio... FDR created many new jobs with the CCC (Civilian Conservation Corps). They built bridges, cut down trees, etc.