Yes, these both are inter-related..... You have to explain the khaldon's concept of evolution and then correlate it with the concept of asabiyah: as for example, "if there is no Asabiyah, no state exist and if no state exist then how can you define the cycle of it's decline, which is in actual evolution"
Actually I have opted political sci and explained from that side, as this concept is also mentioned there.. Hope so it may help