Why did Soviet leader Mikhail Gorbachev have to introduce reforms inside the Soviet Union?

Gorbachev brought perestroika to the Soviet Union's foreign economic sector with measures that Soviet economists considered bold at that time.

Explanation:

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.

the main reason the us senate rejected the treaty of versailles was because "european nations wanted to punish germany"

d(:

me and mark as brainliest.