who says Soviets invaded them (well, thanks to western media), fact is they're invited (begged actually to safeguard against uprising) by then president Taraki, kosygin like Brezhnev were dead against for sending ground troops or full fledged operations, but thanks to Coldwar fear psychosis, Afganistan ended up as play ground of big players (war mongers).
on life there, no social changes as such, earlier they use to fight with sticks now with Kalashnikovs.