Serbia supplied the rebels with weapons so that they could kill the archduke. Austria-Hungary declared war on Serbia. Russia entered to defend Serbia because they both had large Slavic populations. Germany entered to defend Austria-Hungary. Alliances drew other countries in until it was a world war.
George Gershwin helped spread jazz and ragtime music to white people. Before that, jazz was a predominantly black music and was considered too raucous to white people. Gershwin made it popular because he too was white.
Answer:
The answer would be Cleisthenes.
Dont know sorry if i knew then i would tell you but i really dont:(