While the primary contention of the Wars of the Roses revolved around the English throne, underlying socio-economic factors also played substantial roles. The 15th century was a period of economic change and uncertainty. The feudal system was declining, giving way to a newer economic model with a growing merchant class. Tensions arose from land ownership disputes, economic downturns, and shifts in trade dynamics. The nobility, deeply entrenched in this economic framework, often had their ambitions and loyalties shaped by these factors. Thus, while the dynastic dispute was central, the broader socio-economic landscape provided the context in which these battles were fought.

King Edward III had multiple sons, and the lineage from these sons became the foundational basis for the rival claims of the Lancasters and Yorks. The House of Lancaster was descended from John of Gaunt, the third surviving son of Edward III. On the other hand, the House of York was rooted in the lineage of both the second surviving son, Lionel of Antwerp, and the fourth son, Edmund of Langley. As these sons had their progenies, intertwined marriages and generations of descendants meant that multiple claimants believed they had the strongest right to the English throne, culminating in the dynastic disputes.

Foreign powers, particularly neighbouring France, were acutely observant of the unfolding events in England. The internal strife in England provided strategic opportunities for them. The Lancastrian cause, for instance, received support from the French, particularly during the reign of Margaret of Anjou, the Lancastrian queen. However, it wasn't consistent or absolute support. The extent of foreign intervention often depended on the internal politics of these nations and their diplomatic objectives at any given time. While foreign powers didn't engage directly in most battles, their diplomatic, financial, and logistical support played roles in the broader dynamics of the conflict.

Yes, throughout the Wars of the Roses, there were various attempts to reconcile the two warring factions. One notable example is the Loveday of 1458. This was an event staged by King Henry VI, who was of the Lancastrian line, in an attempt to demonstrate public reconciliation between the Lancasters and the Yorkists. During this event, key members from both sides walked arm-in-arm through London. However, such attempts at reconciliation were often short-lived. The deep-rooted mistrust, political ambitions, and genuine grievances meant that lasting peace remained elusive until the culmination of the Wars.

Absolutely, the Wars of the Roses comprised numerous battles beyond the primary ones highlighted. The Battle of Wakefield (1460), for instance, was a significant Lancastrian victory, during which the Yorkist leader, Richard, Duke of York, was killed. Another crucial encounter was the Battle of Tewkesbury (1471), which saw a definitive Yorkist victory, effectively ending the Lancastrian line's hopes for the throne at that time. Such battles were instrumental in dictating the ebb and flow of the conflict, influencing political alliances, territorial control, and the broader momentum of the Wars.