What issue has caused four different amendments to be added to the constitution since its initial ratification in 1790?

The society changes over time and there are different needs that are to be reflected in the constitution.

Explanation:

A constitution is a living document because it defines the way of life of a lot of people who are not born in the time when the constitution was written.

So it must change with the changes that appear in the society as they come and accommodate those changes while not sacrificing the core values of the constitution that are enshrined in the Bill of Rights.

This is why there were certain amendments to the constitution to add a now necessary juncture into the fold.

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.