The purpose of including the habeas corpus clause in the U.S. Constitution is to protect individual liberties and limit the power of the federal government. Habeas corpus is a legal principle that ensures individuals have the right to challenge the legality of their detention or imprisonment. This clause prevents the government from indefinitely detaining individuals without justification and ensures that they have access to a fair trial.
The purpose of including the prohibition of bills of attainder clause is also to protect individual liberties and limit the power of the federal government. A bill of attainder is a legislative act that declares a person or group guilty of a crime without a trial or judicial process. This clause prohibits the government from passing such laws, preventing arbitrary and unjust punishment.
Lastly, the purpose of including the prohibition of ex post facto laws clause is again to protect individual liberties and limit the power of the federal government. Ex post facto laws are laws that retroactively impose punishment for actions that were not illegal at the time they were committed. This clause prohibits the government from passing such laws, ensuring that individuals are not punished for actions that were not considered illegal when they were committed.