What is the grates achievement of Martin van Buren?

Martin Van Buren's greatest achievement is often considered to be his role in founding the Democratic Party, helping to shape a political organization that would dominate American politics for decades. As the eighth President of the United States, he faced significant challenges, including the Panic of 1837, but he also championed the principle of political party organization and mobilization. Additionally, he was instrumental in the establishment of the spoils system, which promoted the idea of appointing government officials based on party loyalty.