Rubuta ci gaba don wannan sakin layi - Iyalinsa sun yi hijira zuwa Amurka lokacin da yake yaro, tare da taimakon Hebrew Immigrant Aid Society. Ya tafi makaranta a Connecticut, ya kammala karatu a 1910. Maimakon yin karatun injiniya a Jami'ar Yale, matashin Horwitz da abokinsa sun yanke shawarar buɗe kantin sayar da kayan masarufi a Manhattan. A matsayin memba na Tsaron Kasa na Amurka, an kira Horwitz a cikin sabis a karkashin John J. Pershing don shiga cikin Pancho Villa Expedition.
Ka yi haƙuri. Lokacin da ya dawo, ya gano cewa kasuwancin kayan masarufi ya rushe. Horwitz sa'an nan kuma ya yi aiki a yakin duniya na farko a Faransa a matsayin wani sergeant, kuma a matsayin wani sojan doki a Argonne.