1, slave maste were interested in wars, fighting each other. 2, slave master were interested only with luxiurious goods like gold, silver, wine, and not technological improvement., nakupongeza kwa kutumia mitandao ya kijamii kwa manufaa yako kimasomo, ustishike na wadau wanaokuponda kumbuka kwenye msafara wa mamba kengenao hawakosekani. Kep it up.