The reason why troops fire on the protesters at tiananmen square was: , the protesters were calling for democratic reforms
Tiananmen square is located in china and the protest happened in 1989. China has always been ruled by a strong communists/authoritarian rulers in that period. When the protesters called for democratic reforms, the position of the power holder in China could be threatened. This is why they were shots
The type of gov. is democracy
Both describe how ones actions will affect people around them :)