Answer:
Abraham Lincoln's perspective on ending slavery evolved over time. Initially, he opposed using an executive order to abolish slavery, considering it unconstitutional and likely to be overturned by the Supreme Court. However, as the Civil War progressed, he recognized the necessity of an executive order to end slavery and secure the Union. Ultimately, Lincoln issued the Emancipation Proclamation in 1863, declaring all slaves in the Confederate states free. Lincoln was justified in using an executive order to end slavery, as it was essential for securing the Union and ensuring the freedom of all slaves.