This is a suggestion for how early war could be changed to help solve the problem of 3 full eras of peace that a lot of people are having, without going back to runaway civs.
A lot of early wars such as the Roman expansions were fought not just despite the cost but explicitly to make money, through plundering and selling into slavery. In Civ 5 BNW war is seldom profitable, as it leaves you with a larger empire to manage, greater penalties and greater unhappiness. I would suggest the following.
1) Increase the amount of gold from plundering, so that it is worthwhile (it should not give less than the cost of one unit, when many nations went to war to pay for the cost of their armies' upkeep)
2) Allow city razing to bring in 1 worker per 2 population destroyed, or the equivalent amount in gold.
3) Scale down the warmonger penalty so that the extent to which another civ is disgusted with you is calculated as a ratio to how many social policies they have adopted. (If that is too complex it could simply increase each era)
I believe this would offer warmonger civs a real laternative to trade routes as a means of earning gold and building up their infrastructure and would more accurately reflect the real world. The great buildings in Rome were all built with the profits of war, but we are not all still furious at them and refusing to trade with them!
A lot of early wars such as the Roman expansions were fought not just despite the cost but explicitly to make money, through plundering and selling into slavery. In Civ 5 BNW war is seldom profitable, as it leaves you with a larger empire to manage, greater penalties and greater unhappiness. I would suggest the following.
1) Increase the amount of gold from plundering, so that it is worthwhile (it should not give less than the cost of one unit, when many nations went to war to pay for the cost of their armies' upkeep)
2) Allow city razing to bring in 1 worker per 2 population destroyed, or the equivalent amount in gold.
3) Scale down the warmonger penalty so that the extent to which another civ is disgusted with you is calculated as a ratio to how many social policies they have adopted. (If that is too complex it could simply increase each era)
I believe this would offer warmonger civs a real laternative to trade routes as a means of earning gold and building up their infrastructure and would more accurately reflect the real world. The great buildings in Rome were all built with the profits of war, but we are not all still furious at them and refusing to trade with them!