Which act, passed in 1649, guaranteed religious freedom for all Christians?

The Act of Toleration, passed in 1649 in the Maryland Colony, was a significant piece of legislation that granted religious freedom to all Christians. This act was aimed at reducing tensions between different Christian denominations, particularly between Catholics and Protestants, as Maryland was founded as a haven for Catholics by Lord Baltimore. The Act of Toleration specifically allowed for freedom of worship to all who believed in Jesus Christ, thereby establishing a precedent for religious tolerance in America.

This act came at a time of considerable religious conflict in Europe and was pivotal in fostering an environment where diverse Christian beliefs could coexist. It recognized the contributions of different denominations and aimed to protect them from persecution based on their religious beliefs, an important early step towards broader religious freedoms that would later be enshrined in the U.S. Constitution.

In contrast, the other choices do not relate to this context. The Act of Settlement is associated with matters of succession in the English monarchy, the Religious Freedom Act is not specifically recognized as a historical act from this period, and the Acts of Unity do not pertain to religious toleration but rather focus on political union.