This depends on the time period but the only time that they spread their influence they didn't do it nicely so i would say the firearm ,"GUN" is the invention that helped them <span />
Answer:
The main reason was the revolt of his army. Fearing the prospect of facing other large armies and exhausted by years of campaigning, Alexander's army mutinied at the Hyphasis River (Beas), refusing to march farther east.
Explanation: Goooooooogle. Credit to gooooogle.
Gregor Mendel: Basically discovered traits are inherited and created laws to explain dominance and recessive traits and genes
Answer:
Personality, Family, and Socialaity. These are some elements.
Explanation:
The fourteen points were too idealistic and not all countries like his policies of national self determination and world disarmament, and some countries also refused to join the league of nations such as Russia as they were not invited to join
