How did the Roman Republic fall

The Answer is given in the Explanation.

Explanation:

The fall of the Roman Republic relates to a long period of political instability and social unrest from around 134 BC. C. to 44 a. C., which culminated in the the advent of the Roman Empire and disappearance of the Roman Republic.

The definite dates of the crisis are unclear because "Rome has been oscillating between normality and crisis for many decades".

Likewise, the causes and characteristics of the crisis have changed over the decades, including forms of slavery, brigades, internal and external wars, land reforms, the invention of intolerable new punishments, the expansion of Roman citizenship, and even the changing composition of the Roman army.

Modern scientists also don't agree on the nature of the crisis. Traditionally, the expansion of citizenship (with all its rights, privileges, and duties) has been negatively assessed by Sallust, Gibbon, and others at their schools, as it has led to internal disagreements, conflicts with Rome's Italian allies, slave riots, and riots. However, other scientists have argued that the majority of the population, the poor and the disenfranchised cannot be accused of clearing up their legitimate and legal complaints since the Republic should be respublica.

Roman Empire stretched across huge landscape and that is from the British Isles to Egypt and Iraq.

Explanation:

The Fall of Rome or the Fall of the Roman Empire refers to the defeat and sacking of the capital of the Western Roman Empire. This brought approximately thousand two hundred years of Roman domination in Western Europe to its end. Christianity. Metal lead in the water supply and military troubles contributed to the fall of Rome. Christian religious beliefs conflicted with the working of empire. Christianity was at its peak when it was embraced by the Roman ruler Constantine. But it was not totally accepted by the priests and the emperors who already have their way of following traditions.

Barbarians and Vandals were used to collect taxes and they used aggressive methods for collecting taxes and this created a bitter rift between the civilians and the Roman monarch. They were also given power in Roman Bureaucracy too.  Vandals took over the Roman territory in Africa, Rome lost Spain which means Rome lost its permanent source of Revenue. The army grew weak from a lack of wars and stopped wearing their protective armor and this made them vulnerable to enemy attacks. Romans suffered from lead poisoning. Inflation and over taxing the civilians caused the fall of Rome.