How has the u. s. economy changed over the past 50 years?

It has changed dramatically. The US economy has been on an upward trajectory for the past 50 years due to economic expansion and the way the country is being run. While there were downfalls in certain phases, the general trajectory has been positive. 

Upheld the 1st amendment according to the u.s constitution. freedom of speech being limited in this case yes national emergencies

Possess private property.