King Edward I was known for his military campaigns in Scotland and Wales, as well as his efforts to assert English control over both territories. He led several invasions of Scotland, and built a series of castles, including Caernarfon Castle, to solidify English control. He also passed the Statute of Rhuddlan in 1284, which effectively annexed Wales to the English Crown.

In addition to his military campaigns, Edward I was also known for his role in the development of English common law. He issued several important legal reforms, such as the Statute of Westminster (1275) and the Statute of Gloucester (1278), which helped to standardize legal procedures and strengthened the authority of the royal courts.

Edward I also had conflicts with the Catholic Church. He was at odds with Pope Boniface VIII over the question of papal jurisdiction in England, which ultimately led to the issuance of the papal bull Clericis Laicos, forbidding the payment of taxes to the English crown without papal permission. He also was involved in the election of Pope Clement V.

Edward I also summoned the first "model parliament" in 1295, which included representatives from the major towns and the counties, as well as bishops and nobles. This parliament, which was seen as a precursor to the modern British parliament, was called to raise funds to finance Edward's wars in Scotland and France.

In terms of economic and social issues, King Edward I was responsible for the Statute of Winchester, which regulated the use of forests for hunting and required the repair of bridges and roads to improve communication and trade. He also instituted a number of policies aimed at controlling the economy and stabilizing prices, such as the "Assize of Bread and Ale," which regulated the price of bread and ale, and the "Statute of the Staple," which established certain towns as official centers for the export of wool.

Overall, King Edward I was a powerful and ambitious king who left a lasting impact on England, Scotland and Wales through his military campaigns, legal reforms, and economic policies.