This is a series of riddles, whose answers all have a relation to each other. Answer the riddles to find the relation.

Riddle 1:

I am a bond that is hard to break,
And you can have one of me with anyone,
as long as you remain kind and friendly.

Riddle 2:

I was born of a person,
who shares their name with a weapon.
They called America the golden land,
But I'm the one with the street of gold.
I have 4 regions,
North, South, East, and West.

Riddle 3:

I arrive when one must play along with something that they don't agree with.
When one fights the higher power,
I am there.

Riddle 4:

If I want to,
I can fight the science textbook.
People want my power,
yet instead of revering me,
they might kill me.