Sollozzo set in motion all of the events that would lead to an all out war among the New York families which would have serious repucussions for all, especially the Corleones. It led to Michael's life-changing decision to go with his father. Solozzo sought to get the families in the narcotics business, which Vito knew was a bad move. Sollozzo tried to kill Vito, and was willing to go into a hospital to finish the job.