Industrialization and/or Urbanization. We now have technology fields, and higher paying job fields, that seem more interesting or grabs the younger generations attention.
When unions were first organized, union leaders were in competition with one another in order to get the most active labor members, but they soon realized that this was a failing tactic and often united into single groups.
The legislative branch makes laws, the judicial branch interprets laws, the executive branch enforces laws
The Iroquois : formed a confederation that may have inspired the U.S. constitution.
The Powhatan: helped the first settlers from Europe survive.
The Iroquois:gave women a voice in choosing tribal representatives.
I hope it helps!