Question

who were jacobins and their principles​

Answer 1

Their leaders—Maximilien Robespierre and Louis de Saint-Just, among others—relied mainly on the strength of the Paris commune and the Parisian sans-culottes. After the fall of the Girondists (June, 1793), for which the Jacobins were largely responsible, the Jacobin leaders instituted the Reign of Terror.

Answer 2

Jacobin was a club of the people of 2nd and 3rd estate,who discussed day to day problems.

Maxilian Ropespiere was the leader of this club.