What was the cause of shay's rebellion? what was its effect in our government?

The rebels during shay's rebellion were ex-Revolutionary War soldiers turned farmers. They opposed state economic policies causing poverty and property foreclosures. This rebellion definitely gave more power to the federal government to keep states in order. It also brought fear to the delegates making them believe the country would fall into anarchy.

Hope this helps

answer; i believe the two groups were irish immigrants and chinese immigrants;

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.