You need xorg-server xf86-input-mouse xf86-input-keyboard xf86-input-synaptics(for laptops) xf86-video-$brand xorg-xinit(if you want to use startx) xterm(not required, can be useful)
I guess the xorg meta package was never put back.
I ran the command, pacman -S xorg , and it tells me that it is not
found. It then asks if I want to install the whole group, which
consists of around 10 xorg and xf86 packages. Thanks for any help.