Mirabeau and Abbe Sieyes were two prominent figures in the French Revolution who played significant roles in shaping the course of the revolution. Let's have a look at their contributions in detail:

Mirabeau:
- Mirabeau was a French politician and orator who played a crucial role in the early stages of the French Revolution.
- He was a member of the National Assembly and was known for his passionate speeches in support of the revolution.
- Mirabeau was instrumental in drafting the Declaration of the Rights of Man and Citizen, which became a cornerstone of the revolution.
- He also played a key role in the formation of the Jacobin Club, which later became a major force in the revolution.
- Mirabeau's death in 1791 was a major blow to the revolution, as he was one of its most charismatic and influential leaders.

Abbe Sieyes:
- Abbe Sieyes was a French clergyman and political theorist who was also a member of the National Assembly.
- He was the author of the famous pamphlet "What is the Third Estate?" which argued that the third estate (the common people) should have more power in the government.
- Sieyes was a key figure in the drafting of the new French constitution, and his ideas about the separation of powers and the role of the executive branch were influential in the formation of the government.
- He also played a role in the overthrow of the monarchy, and was a member of the Committee of Public Safety during the Reign of Terror.

In conclusion, Mirabeau and Abbe Sieyes were two important figures in the French Revolution who played significant roles in shaping the course of the revolution. Their contributions to the drafting of the Declaration of the Rights of Man and Citizen, the formation of the Jacobin Club, and the drafting of the new French constitution were all instrumental in the success of the revolution.

Mirabeau was from Nobel family.He was worried by injustice done to third estste.He gave powerful speeches to the crowd gathered in the indoor court versallies and helped to draft a constitution for France.Abe suis originally from clergy family helped the people of the third estate .He wrote an influential pamphlet called "What is third estate".