What were the primary or main requirements to vote in most of the states?

In most states, the primary requirements to vote historically included:

1. Age: The minimum age requirement varied from state to state, but it was typically set at 21 years old. It was later reduced to 18 in 1971 with the ratification of the 26th Amendment to the U.S. Constitution.

2. Citizenship: Being a citizen of the United States was a fundamental requirement. Initially, naturalized citizens were often not granted the right to vote, but this changed over time. The Voting Rights Act of 1965 further enforced the right to vote for all citizens, regardless of race or national origin.

3. Residence: The majority of states required that voters be residents of the state for a certain period of time. The specific period varied, ranging from a few months to a year. This requirement aimed to prevent people from moving to another state solely to vote and potentially influence the outcome.

It's important to note that these requirements have evolved over time in response to political and social developments, particularly in relation to civil rights movements. The modern requirements for voting in each state can differ, so it is best to consult your state's election laws and regulations for up-to-date information.