Vladimir Lenin enacted which policy as the leader of the Soviet Union?

The New Economic Policy (NEP)

Explanation:

Under the leadership of Russian communist revolutionary Vladimir Lenin, the Bolshevik Party seized power in the Russian Republic during a coup known as the October Revolution.

The New Economic Policy (NEP) was an economic policy of the Soviet Union proposed by Vladimir Lenin in 1921 as a temporary expedient.

General unrest erupted in an insurrection in the Kronstadt naval base. At this time (Mar., 1921) Lenin introduced the NEP in order to revive the economy. The new program signified a return to a limited capitalist system.

By 1928, the NEP had raised the Soviet national income above its prewar level.